|Highest governing body||World Flying Disc Federation|
|Team members||Grass: 7/team; indoor: 5/team; turf: 5/team; beach: 5/team|
(sometimes fewer or more)
|Mixed-sex||In some competitions and most leagues|
|Olympic||Recognized by International Olympic Committee; eligible for 2028 Olympics.|
|World Games||1989 (invitational), 2001–present|
Ultimate, originally known as ultimate frisbee, is a non-contact team sport played with a disc flung by hand. Ultimate was developed in 1968 by Joel Silver in Maplewood, New Jersey. Although ultimate resembles many traditional sports in its athletic requirements, it is unlike most sports due to its focus on self-officiating, even at the highest levels of competition. The term "frisbee" is a registered trademark of the Wham-O toy company, and thus the sport is not formally called "ultimate Frisbee", though this name is still in common casual use. Points are scored by passing the disc to a teammate in the opposing end zone. Other basic rules are that players must not take steps while holding the disc, and interceptions, incomplete passes, and passes out of bounds are turnovers. Rain, wind, or occasionally other adversities can make for a testing match with rapid turnovers, heightening the pressure of play.
From its beginnings in the American counterculture of the late 1960s, ultimate has resisted empowering any referee with rule enforcement. Instead, it relies on the sportsmanship of players and invokes the "spirit of the game" to maintain fair play. Players call their own fouls, and dispute a foul only when they genuinely believe it did not occur. Playing without referees is the norm for league play but has been supplanted in club competition by the use of "observers" or "game advisors" to help in disputes, and the professional league employs empowered referees.
In 2012, there were 5.1 million ultimate players in the United States. Ultimate is played across the world in pickup games and by recreational, school, club, professional, and national teams at various age levels and with open, women's, and mixed divisions.
The United States has historically won most of the world titles, though not all. US teams won all three divisions (women's, men's, and mixed gender) at the U-24 world championship in 2019, and all divisions in 2016 competitions between national teams.
Invention and history
I just remember one time running for a pass and leaping up in the air and just feeling the Frisbee making it into my hand and feeling the perfect synchrony and the joy of the moment, and as I landed I said to myself, 'This is the ultimate game. This is the ultimate game.'— Jared Kass, one of the inventors of ultimate, interviewed in 2003, speaking of the summer of 1968
Team flying disc games using pie tins and cake pan lids were part of Amherst College student culture for decades before plastic discs were available. As of 2023, the college currently boasts a woman's team called Sparkle Motion (inspired by the dance team in Donnie Darko) and an open team titled Army of Darkness. A similar two-hand, touch-football-based game was played at Kenyon College in Ohio starting in 1942.
From 1965 or 1966 Jared Kass and fellow Amherst students Bob Fein, Richard Jacobson, Robert Marblestone, Steve Ward, Fred Hoxie, Gordon Murray, and others evolved a team frisbee game based on concepts from American football, basketball, and soccer. This game had some of the basics of modern ultimate, including scoring by passing over a goal line, advancing the disc by passing, no travelling with the disc, and turnovers on interceptions or incomplete passes. Kass, an instructor and dorm advisor, taught this game to high school student Joel Silver during the summer of 1967 or 1968 at Northfield Mount Hermon School summer camp.
Joel Silver, along with fellow students Jonny Hines, Buzzy Hellring, and others, further developed ultimate beginning in 1968 at Columbia High School, Maplewood, New Jersey, US (CHS). The first sanctioned game was played at CHS in 1968 between the student council and the student newspaper staff. Beginning the following year, evening games were played in the glow of mercury-vapor lights on the school's student-designated parking lot. Initially players of ultimate Frisbee (as it was known at the time) used a "Master" disc marketed by Wham-O, based on Fred Morrison's inspired "Pluto Platter" design. Hellring, Silver, and Hines developed the first and second edition of "Rules of Ultimate Frisbee". In 1970 CHS defeated Millburn High 43–10 in the first interscholastic ultimate game, which was played in the evening in the CHS's faculty parking lot. Millburn, and three other New Jersey high schools made up the first conference of ultimate teams beginning in 1971.
Alumni of that first league took the game to their colleges and universities. Rutgers defeated Princeton 29–27 in 1972 in the first intercollegiate game. This game was played exactly 103 years after the first intercollegiate American football game by the same teams at precisely the same site, which had been paved as a parking lot in the interim. Rutgers won both games by an identical margin.
Rutgers also won the first ultimate Frisbee tournament in 1975, hosted by Yale, with 8 college teams participating. That summer ultimate was introduced at the Second World Frisbee Championships at the Rose Bowl. This event introduced ultimate on the west coast of the US.
In 1975, ultimate was introduced at the Canadian Open Frisbee Championships in Toronto as a showcase event. Ultimate league play in Canada began in Toronto in 1979. The Toronto Ultimate Club is one of ultimate's oldest leagues.
In January 1977 Wham-O introduced the World Class "80 Mold" 165 gram frisbee. This disc quickly replaced the relatively light and flimsy Master frisbee with much improved stability and consistency of throws even in windy conditions. Throws like the flick and hammer were possible with greater control and accuracy with this sturdier disc. The 80 Mold was used in ultimate tournaments even after it was discontinued in 1983.
Discraft, founded in the late 1970s by Jim Kenner in London, Ontario, later moved the company from Canada to its present location in Wixom, Michigan. Discraft introduced the Ultrastar 175 gram disc in 1981, with an updated mold in 1983. This disc was adopted as the standard for ultimate during the 1980s, with Wham-O holdouts frustrated by the discontinuation of the 80 mold and plastic quality problems with discs made on the replacement 80e mold. Wham-O soon introduced a contending 175 gram disc, the U-Max, that also suffered from quality problems and was never widely popular for ultimate. In 1991 the Ultrastar was specified as the official disc for UPA tournament play and remains in wide use.
The popularity of the sport spread quickly, taking hold as a free-spirited alternative to traditional organized sports. In recent years college ultimate has attracted a greater number of traditional athletes, raising the level of competition and athleticism and providing a challenge to its laid back, free-spirited roots.
In 2010, Anne Watson, a Vermont teacher and ultimate coach, launched a seven-year effort to have ultimate recognized as full varsity sport in the state's high schools. Watson's effort culminated on November 3, 2017, when the Vermont Principals Association, which oversees the state's high school sports programs, unanimously approved ultimate as a varsity sport beginning in the Spring 2019 season. The approval made Vermont the first U.S. state to recognize ultimate as a varsity sport.
In 2019, Oklahoma Christian University launched the first American varsity ultimate program and full ride ultimate scholarships competing in Division 3 Men's. They would go on to win National Championships in 2021 and 2022. Davenport University aims to follow suit adding Men's and Women's teams beginning in the 2023–24 academic year.
In late December 1979, the first national player-run ultimate organization was founded in the United States as the Ultimate Players Association (UPA). Tom Kennedy was elected its first director. Before the UPA, events had been sponsored by the International Frisbee Association (IFA), a promotional arm of Wham-O.
The UPA organized regional tournaments and has crowned a national champion every year since 1979. Glassboro State College defeated the Santa Barbara Condors 19–18 at the first UPA Nationals in 1979.
In 2010, the UPA rebranded itself as USA Ultimate.
The first European Championship tournament for national teams was held in 1980 in Paris. Finland won, with England and Sweden finishing second and third. In 1981 the European Flying Disc Federation (EFDF) was formed. In 1984 the World Flying Disc Federation (WFDF) was formed by the EFDF to be the international governing body for disc sports. The first World Championships tournament was held in 1983 in Gothenburg, Sweden.
The European Ultimate Federation is the governing body for the sport of ultimate in Europe. Founded in 2009, it is part of the European Flying Disc Federation (EFDF) and of the World Flying Disc Federation.
In 2006, ultimate became a BUCS accredited sport at Australian and UK universities for both indoor and outdoor open division events.
A point is scored when one team catches the disc in the opposing team's end zone.
Each point begins with both teams lining up on the front of their respective end zone line. Standing beyond the end zone line before the disc is thrown by the defense (a "pull") to the offense is known as an "offsides" violation. A regulation grass outdoor game has seven players per team. In mixed ultimate, the teams usually play with a "4-3" ratio, meaning either 4 men and 3 women or 4 women and 3 men will be playing. The offensive end zone dictates whether there are more men or women. This end zone is called the 'gen-zone', short for gender zone.
Each point begins with the two teams starting in opposite end zones. The team who scored the previous point are now on defense. The teams indicate their readiness by raising a hand, and the team on defense will throw the disc to the other team. This throw is called a "pull". When the pull is released, all players are free to leave their end zones and occupy any area on the field. Both teams should not leave the end-zone before the pull is released. Thus, the defending team must run most of the field length at speed to defend immediately, and a good pull is designed to hang in the air as long as possible to give the defending team time to make the run. To score goals, the players of each team try to get the possession of the flying disc (without making physical contact with players), pass it from one teammate to the other, and keep it away from the opponents till it is carried all the way towards their (opponents’) end zone or goal area. Each end-zone lies at each end of the court.
The player holding the disc must establish a pivot point (i.e. they cannot run with the disc, just step out from a single point). They must establish a pivot at "the appropriate spot" on the field (where they caught the disc, or as soon as possible after slowing down). The player can also catch and throw the disc within three steps without establishing a pivot. A violation of these rules is called a "travel". The disc is advanced by throwing it to teammates. If a pass is incomplete, it is a "turnover" and the opposing team immediately gains possession, playing to score in the opposite direction. Passes are incomplete if they are caught by a defender, touch the ground (meaning defenders need only knock the disc out of the air to gain possession), or touch an out-of-bounds object before being caught. The first body part to touch the ground is the one considered for bounds, which means a player may catch the disc and 'toe the line', or put a foot down, before falling out of bounds. Once possession of the disc is obtained, however, it cannot be forced out of the throwers possession before it leaves their hand. A common infraction of this nature is called a "strip", in which one player feels that they had enough possession of the disc to stop its rotation before it was taken out of their hand. However, if a player jumps from in bounds, catches, and then throws the disc while in the air and technically out of bounds, the disc is still in play and can be caught or defended by players on the field. This feat of athleticism and precision is highly praised, and dubbed "Greatest."
Ultimate is non-contact. Non-incidental, play-affecting, or dangerous physical contact is not allowed. Non-incidental contact is a foul, regardless of intent, with various consequences depending on the situation and the league rules. Incidental contact, like minor collisions while jumping for the disc or running for it, can be acceptable, depending on the circumstances. Parameters like who has the "right" to the relevant space, who caught the disc etc. will determine whether a foul has been committed or not. Attitudes can vary between leagues and countries, even if the letter of the rule remains the same.
Contact is disallowed for both defence and offence, including the defender marking the offensive player with the disc, and there are further restrictions on positions this defender can take in order to minimize incidental contact.
Defending against the person who has the disc is a central part of the defensive strategy (colloquially "marking"). The defensive "marker" counts aloud to 10 seconds, which is referred to as "stalling". If the disc has not been thrown when the defending player reaches 10, it is turned over to the other team. "Stall" can only be called after the defender has actually counted the 10 seconds. In order for the "mark" to be considered as counting all the way to ten, the thrower must throw the disc before the mark is able to say the "T" in the word ten. If the mark is accused of counting too fast (called a "fast-count"), then the thrower can call a violation, in which the mark then has to subtract two seconds from their previous stall count and slow their counting. There can only be one player defending in a 3 meters (9.8 ft) radius around the person who has the disc unless that player is defending against another offensive player. The marker must stay one disc's diameter away from the thrower and must not wrap their hands around the thrower, or the person with the disc can call a foul ("wrapping").
In ultimate, there is no concept of intentional vs. unintentional fouls: infractions are called by the players themselves and resolved in such a way as to minimize the impact of such calls on the outcome of the play (sometimes resulting in "do-overs" where the disc is returned to the last uncontested possession), rather than emphasizing penalties or "win-at-all-costs" behavior. If a player disagrees with a foul that was called on them, they can choose to "contest" the infraction. In many instances, a conversation ensues between both parties involved in the foul, and a verdict is determined as to whether the disc will be returned and a "do-over" will commence, or if the person guilty of the foul has no objections to the call. A common infraction, intentional or not, is a "pick" where the offense (or your own team member even) is somehow in the way of your pursuit of your "check" in man-to-man defense. This only applies when you started within 10 feet of your "check" and the game play is stopped so that the players involved go back to where the "pick" occurred. The integrity of ultimate depends on each player's responsibility to uphold the spirit of the game. Ultimate is predominantly self-refereed, relying on the on-field players to call their own infractions and to try their best to play within the rules of the game. It is assumed that players will not intentionally violate the rules and will be honest when discussing foul calls with opponents. This is called Spirit of the Game, or simply Spirit. After a call is made, the players should agree on an outcome, based on what they think happened and how the rules apply to that situation. If players cannot come to agreement on the call's validity, the disc can be given back to the last uncontested thrower, with play restarting as if before the disputed throw. Coaches and other players on the sidelines cannot make calls, however they may inform players of specific rules in the case of a contested call. Players on the sideline may also be asked for their view, as they often have "best perspective" to see what happened.
A regulation outdoor game is played 7 vs. 7, with substitutions allowed between points and for injuries. Games are typically played to a points limit of 13/15/17 or more, or a time limit of 75/90/100 minutes. There is usually a halftime break and an allowance of two timeouts per team each half.
Competitive ultimate is played in gender divisions using gender determination rules based on those of the IOC. Different competitions may have a "men's" or an "open" division (the latter usually being extremely male-dominated at competitive levels, but technically unrestricted). Mixed is officially played with 4 of one gender and 3 of the other, but variants exist for different numbers. Men's, women's, and mixed ultimate are played by the same rules besides those explicitly dealing with gender restrictions.
Rulebooks: USAU, WFDF, AUDL
This section needs expansion with: the actual differences. You can help by adding to it. (January 2018)
Some rules vary between North America and the rest of the world. More significant rule changes were made in the AUDL pro league games.
AUDL rule changes
American Ultimate Disc League (AUDL), the semi-professional ultimate league with teams in the U.S. and Canada, has its own variant of the rules, and has made multiple rule changes in recent years. Some of the more important include:
- Slightly larger field dimensions.
- Shorter, 20-yard end zones.
- In WFDF, games are played to X points with two halves and global time caps. In the AUDL, the game is played in four quarters of 12:00 minutes each. The counted times is only when the disc is in actual play, resulting in games lasting over two hours at times. The game stops on the timed second, rather than at the end of the point. At this point the disc is still allowed to be caught, which can result in "buzzer beater" or "in-bound Greatest" attempts, where players attempt to throw the disc right before the time ends.
- Referees making calls instead of players. Players may invoke the "integrity rule" and overrule the referees' call when the players call is against their own team.
- Most fouls are penalized with a 10- or 20-yard move of position against the fouling team.
- Double-teaming is allowed, but not triple-teaming.
- Stall count is 7 seconds instead of 10 seconds.
- Stall count is counted by the referees rather than the marking player.
Throwing and catching techniques
This section needs additional citations for verification. (November 2023)
A player may catch the disc with one or two hands. A catch can grab the rim with one or two hands, or simultaneously grab the top and bottom of the frisbee – in a clap-catch / "pancake catch". Care is needed with the hand placement when catching with one hand on the disc rim, making sure to catch on the proper side of the disc, according to which way the disc is spinning. When a frisbee is thrown at high speeds, as is frequently the case in a competitive game of ultimate, one side of the disc can spin out of the player's hand, and the other side can spin into their hand, which can make a catch far more secure. For this reason, along with the desire to secure the frisbee strongly and "cleanly", the general advice is to strongly prefer to catch with two hands if possible.
The most popular throws are backhand and forehand/flick. Less frequently used throws include the hammer, scoober, thumber, push-passes, chicken wing, biscuit, and throwing with the non-dominant hand. Part of the area of ultimate where skill and strategy meet is a player's capacity to plot and execute on throwing and passing to outrun another team, which is colloquially known as "being a deep threat". For example, multiple throwing techniques and the ability to pass the disc before the defense has had a chance to reset helps increase a player or team's threat level, and merging that with speed and coordinated plays can form a phalanx that is hard for competitors to overcome.
When referencing the curve of a throw, the terms outside-in (OI) and inside-out (IO) are used. An OI throw is one that curves in towards the opposite side of the throwers body from which it is thrown. An IO throw is one that curves toward the same side of the throwers body from which it is thrown. With the rotation of the disc in mind, an IO throw has the side of the disc rotating toward the direction of the throw angled to the ground, whereas an OI throw has the side of the disc rotating toward the thrower angled to the ground. IO throws are generally the more difficult throw, and are very useful for breaking the mark.
Strategy and tactics
Teams can employ many different offensive strategies, each with distinct goals. Most basic strategies are an attempt to create open space (e.g. lanes) on the field in which the thrower and receiver can complete a pass. Organized teams assign positions to the players based on their specific strengths. Designated throwers are called handlers and designated receivers are called cutters. The amount of autonomy or overlap between these positions depends on the make-up of the team.
Many advanced teams develop variations on the basic offenses to take advantage of the strengths of specific players. Frequently, these offenses are meant to isolate a few key players in one-on-one situations, allowing them to take advantage of mismatches, while the others play a supporting role.
Handlers and cutters
In most settings, there are a few "handlers" which are the players positioned around the disc. Their task is to distribute the disc forward and provide easy receiving options to whoever has the disc. Cutters, are the players positioned downfield, whose job is usually to catch the disc farther afield and progress the disc through the field or score goals by catching the disc in the end zone.
Typically, when the offense is playing against a zone defense the cutters will be assigned positions based on their location on the field, oftentimes referred to as "poppers and rails (or deep deeps)." Poppers will typically make cuts within 15 yards of the handler positions while rails alternate between longer movements downfield. Additionally, against a zone there are typically three or four instead of the usual two or three, depending on the team.
One of the most common offensive strategies is the vertical stack. In this strategy, a number of offensive players line up between the disc and the end zone they are attacking. From this position, players in the stack make cuts (sudden sprints, usually after throwing off the defender by a "fake" move the other way) into the space available, attempting to get open and receive the disc. The stack generally lines up in the middle of the field, thereby opening up two lanes along the sidelines for cuts, although a captain may occasionally call for the stack to line up closer to one sideline, leaving open just one larger cutting lane on the other side. Variations of the vertical stack include the Side Stack, where the stack is moved to a sideline and one player is isolated in the open space, and the Split Stack, where players are split between two stacks, one on either sideline. The Side Stack is most helpful in an end zone play where your players line up on one side of the end zone and the handler calls an "ISO" (isolation) using one of the player's names. This then signals for the rest of the players on your team to clear away from that one person in order for them to receive a pass. Another variation is called Cascades, which starts by setting a side stack. Then, the player at the top or bottom of the stack cuts, using the large amount of available space. Once the initial cutter has finished (whether they caught the disc or if they were waved away by the handler), then the next cutter in line continues. In vertical stack offenses, one player usually plays the role of 'dump', offering a reset option which sets up behind the player with the disc.
Another popular offensive strategy is the horizontal stack, also called “ho-stack”. In the most popular form of this offense, three "handlers" line up across the width of the field with four "cutters" downfield, spaced evenly across the field. This formation encourages cutters to attack any of the space either towards or away from the disc, granting each cutter access to the full width of the field and thereby allowing a degree more creativity than is possible with a vertical stack. If cutters cannot get open, the handlers swing the disc side to side to reset the stall count and in an attempt to get the defense out of position. Usually players will cut towards the disc at an angle and away from the disc straight, creating a 'diamond' or 'peppermill' pattern.
Feature, German, or isolation
A variation on the horizontal stack offense is called a feature, German, or isolation (or "iso" for short). In this offensive strategy three of the cutters line up deeper than usual (this can vary from 5 yards farther downfield to at the endzone) while the remaining cutter lines up closer to the handlers. This closest cutter is known as the "feature", or "German". The idea behind this strategy is that it opens up space for the feature to cut, and at the same time it allows handlers to focus all of their attention on only one cutter. This maximizes the ability for give-and-go strategies between the feature and the handlers. It is also an excellent strategy if one cutter is superior to other cutters, or if they are guarded by someone slower than them. While the main focus is on the handlers and the feature, the remaining three cutters can be used if the feature cannot get open, if there is an open deep look, or for a continuation throw from the feature itself. Typically, however, these three remaining cutters do all they can to get out of the feature's way. It is usually used near the endzone.
Hexagon or Mexican
A newer strategy, credited to Felix Shardlow from the Brighton Ultimate team, is called Hexagon Offence. Players spread out in equilateral triangles, creating a hexagon shape with one player (usually not the thrower) in the middle. They create space for each other dynamically, aiming to keep the disc moving by taking the open pass in any direction. This changes the angles of attack rapidly, and hopes to create and exploit holes in the defense. Hex aims to generate and maintain flow to lead to scoring opportunities.
The pull is the first throw of the game and also begins each period of play. A good, accurate pull is an important part of a defensive strategy. The optimal pull has two features: 1) To start the offense as deep into their own end-zone as possible, giving the offense more distance to cover. 2) To stay in the air as long as possible, giving the defense more time to get set up before the first offensive pass, or in the case of a deep end-zone pull, chooses to run up to the front of their end-zone line and begin their offense at yard zero. A pull is not limited to any certain throw. However, most players use the inside out backhand throw to achieve maximum hang time.
There is no pivot required for a pull. The offensive team must have at least one foot on the goal line and must not change their position until the disc has left the thrower's hand. The defensive team must stay behind the 'puller' until the disc is released, or it is considered 'offside'. The defensive team is not allowed to touch the disc until it has been touched by the opposing team or has touched the ground. A pull that is touched midair by the offense, but is not caught, results in a turnover.
One of the most basic defensive principles is the "force" or "mark". The defender marking the thrower essentially tries to force them to throw in a particular direction (to the "force side" or "open side"), whilst making it difficult for them to throw in the opposite direction (the "break side"). Downfield defenders make it hard for the receiving players to get free on the open/force side, knowing throws to the break side are less likely to be accurate. The space is divided in this way because it is very hard for the player marking the disc to stop every throw, and very hard for the downfield defenders to cover every space.
The force can be decided by the defence before the point or during play. The most common force is a one-way force, either towards the "home" side (where the team has their bags/kit), or "away". Other forces are "sideline" (force towards the closest sideline), "middle" (force towards the center of the field), "straight up" (the force stands directly in front of the thrower – useful against long throwers), or "sidearm/backhand" if one wishes their opponents to throw a particular throw. Another, more advanced marking technique is called the "triangle mark". This involves shuffling and drop stepping to take away throwing angles in an order that usually goes: 1) take away shown throw "inside" 2) shuffle to take away 1st pivot "around" 3) drop step and shuffle to take away 2nd pivot 4) recover. However, this marking technique is typically used to block long throws as well as force a certain side.
The simplest defensive strategy is the match-to-match defense (also known as "one-to-one", "person-to-person", "man-on-man", or "man defense"), where each defender guards a specific offensive player, called their "mark". This defense creates one-to-one matchups all over the field – if each defender shuts out their mark, the team will likely earn a turn over. The defensive players will usually choose their mark at the beginning of the point before the pull. Often players will mark the same person throughout the game, giving them an opportunity to pick up on their opponent's strengths and weaknesses as they play.
Poaching is a term used to describe one or more players temporarily leaving their match up to strategically cover space in an otherwise person-to-person defensive scheme. Typical areas covered might be deep space (to defend long throws aimed at scoring quickly), near handlers (to narrow throwing lanes, making throws more difficult), or leaving players who are less likely to get the disc to help cover other areas of the field that are more likely to be directly attacked (such as moving closer to the disc when the disc is trapped on one side of the field).
A common occurrence of poaching is when a player is accidentally open in a dangerous position. In this situation, it is common for another player to temporarily cover him defensively to avoid a fast score. This is common when the deepest person of the defense sees someone running past him, without a defender catching up to him, and it might be considered obligatory to run and cover the player open deep.
Players may also leave their match to cover throwing lanes, particularly if they are marking a reset or alternative handler.
With a zone defensive strategy, the defenders cover an area rather than a specific person. The area they cover varies depending on the particular zone they are playing, and the position of the disc. Zone defense is frequently used in poor weather conditions, as it can pressure the offense into completing more passes, or the thrower into making bigger or harder throws. Zone defence is also effective at neutralising the deep throw threat from the offense. A zone defense usually has two components – (1) a number of players who stay close to the disc and attempt to contain the offenses' ability to pass and move forward (a "cup" or "wall"), and (2) a number of players spaced out further from the disc, ready to bid on overhead or longer throws.
The cup involves three players, arranged in a semi-circular cup-shaped formation, one in the middle and back, the other two on the sides and forward. One of the side players marks the handler with a force, while the other two guard the open side. Therefore, the handler will normally have to throw into the cup, allowing the defenders to more easily make blocks. With a cup, usually the center cup blocks the up-field lane to cutters, while the side cup blocks the cross-field swing pass to other handlers. The center cup usually also has the responsibility to call out which of the two sides should mark the thrower, usually the defender closest to the sideline of the field. The idea of the cup is to force the offense to attempt risky throws through and around the cup that have low rates of completion. The cup (except the marker) must also remember to stay 3 meters or more away from the offensive player with the disc. The only time a player in the cups can come within 3 meters of the player with the disc is when another offensive player comes within 3 meters of the person with the disc, also known as "crashing the cup". When the second offensive player moves further than 3 meters away, the members of the cup (except the marker) must go back to being 3 meters or more away from the player with the disc.
The "wall" sometimes referred to as the "1-3-3" involves four players in the close defense. One player is the marker, also called the "rabbit", "chaser" or "puke" because they often have to run quickly between multiple handlers spread out across the field. The other three defenders form a horizontal "wall" or line across the field in front of the handler to stop throws to short in-cuts and prevent forward progress. The players in the second group of a zone defense, called "mids" and "deeps", position themselves further out to stop throws that escape the cup and fly upfield. A variation of the 1-3-3 is to have two markers: The "rabbit" marks in the middle third and strike side third of the field. The goal is for the "rabbit" to trap the thrower and collapse a cup around her or him. If the rabbit is broken for large horizontal yardage, or if the disc reaches the break side third of the field, the break side defender of the front wall marks the throw. In this variation the force is directed one way. This variation plays to the strength of a superior marking "rabbit".
Junk and clam
A junk defense is a defense using elements of both zone and match defenses; the most well-known is the "clam" or "chrome wall". In clam defenses, defenders cover cutting lanes rather than zones of the field or individual players. It is so named because, when played against a vertical stack, it is often disguised by lining up in a traditional person defense and right before play starts, defenders spread out to their zonal positions, forming the shape of an opening clam. The clam can be used by several players on a team while the rest are running a match defense. Typically, a few defenders play match on the throwers while the cutter defenders play as "flats", taking away in cuts by guarding their respective areas, or as the "deep" or "monster", taking away any deep throws.
This defensive strategy is often referred to as "bait and switch". In this case, when the two players the defenders are covering are standing close to each other in the stack, one defender will move over to cover them deep, and the other will move slightly more towards the thrower. When one of the receivers makes a deep cut, the first defender picks them up, and if one makes an in-cut, the second defender covers them. The defenders communicate and switch their marks if their respective charges change their cuts from in to deep, or vice versa. The clam can also be used by the entire team, with different defenders covering in cuts, deep cuts, break side cuts, and dump cuts.
The term "junk defense" is also often used to refer to zone defenses in general (or to zone defense applied by the defending team momentarily, before switching to a match defense), especially by members of the attacking team before they have determined which exact type of zone defense they are facing.
Bracket defenses are almost exclusively used on vertical stack offences, and incorporate elements of both zone and match defence. In bracket defense, the handlers are covered by match defence, and the only changes are when marking the cutters. Once the stack has set up, one player (the "deep" or "monster") will set up a defence on the back of the stack. Simultaneously, a defensive player (known as the "under") will set up between the front of the stack and the handler with the disc. The rest of the defence will set up a match defence on the players in the stack. When play begins, any cutters who try to go for a long throw will be covered by the "deep", and any cutters who try to go towards the handler will be covered by the "under". This defence attempts to force the offence into 1-on-1 situations with the strongest defensive players.
Hasami, the Japanese word for "scissors", is a popular hybrid person/zone defence used by the Japanese women's team who won gold at WUGC 2012. The name refers to the method of using two pairs of defenders to cut the area downfield into sections, with defenders responsible for space "under" (nearer the disc) and "away" (towards the end zone), and also the left and right areas of the field. Defenders rely on visual and verbal communication to switch and cover the offensive threats between them. Hasami forms the basis of most Japanese style zone defences.
Hexagon or flexagon
A separate type of defense is hexagon or "flexagon", which incorporates elements of both match-to-match and zonal defense. All defenders are encouraged to communicate, to sandwich their opponents and switch marks wherever appropriate, and to ensure no opposing player is left unmarked.
Spirit of the game
All youth and most club ultimate games are self-officiated through the "spirit of the game", often abbreviated SOTG. Spirit of the game is described by WFDF as an expectation that each player will be a good sport and play fair, as well as having high values of integrity; including "following and enforcing the rules". Another example is the practice of the players "taking a knee," i.e., kneeling on one knee, during the timeout when a player suffers an injury; as a sign of respect to the injured. SOTG is further contextualized and described in the rules established by USA Ultimate; according to The Official Rules of Ultimate, 11th Edition:
Ultimate has traditionally relied upon a spirit of sportsmanship which places the responsibility for fair play on the player. Highly competitive play is encouraged, but never at the expense of the bond of mutual respect between players, adherence to the agreed upon rules of the game, or the basic joy of play. Protection of these vital elements serves to eliminate adverse conduct from the ultimate field. Such actions as taunting of opposing players, dangerous aggression, intentional fouling, or other 'win-at-all-costs' behavior are contrary to the spirit of the game and must be avoided by all players.
Many tournaments give awards for the most spirited teams and/or players, often based on ratings provided by opposing teams. The largest youth ultimate tournament in the world, Spring Reign, uses spirit scores to award a spirit prize within each pool and to determine eligibility of teams the following year. In many non-professional games, it is common for teams to meet after the game in a "spirit circle" to discuss the game, and in some cases grant individual spirit awards.
While "spirit of the game" is a general attitude, ultimate has an agreed upon procedure to deal with unclear or disputed situations.
In Europe and other continents, even top-level play does not have referees. Most world championship games have had no referees, and disputes were decided by the players themselves.
Observers are used in some high-level tournaments outside the US, as well as in some tournaments sanctioned by USA Ultimate. Most calls and disputes are initially handled by the players, but observers may offer to step in if no agreement is reached. A few calls, such as out-of-bounds, are considered 'active calls', and are treated like referee calls in other sports.
Other forms of refereeing exist in ultimate. Professional ultimate in North America uses referees, in part to increase the pace of the game. In some international competitions, game advisors are used who may provide rules clarification or their perspective on plays, though calls and final decisions remain in control of the on-field players.
The common types of competitions are:
- Hat tournaments: random player allocations, mixed levels, and amateur
- Club leagues: usually considered semi-professional
- Professional ultimate: American Ultimate Disc League (AUDL) and Premier Ultimate League (PUL)
- College teams
- National teams competing in international tournaments
Professional Leagues (AUDL, PUL, and WUL in North America)
North America consists of one men's professional-level ultimate league, the American Ultimate Disc League (AUDL), with teams from the United States and Canada. The United States has two women's professional leagues, the Premier Ultimate League (PUL) and the Western Ultimate League (WUL).
The AUDL was founded by Josh Moore and its inaugural season began in April 2012. In 2013 the league was bought by Ultimate Xperience Ventures LLC, a company founded by Rob Lloyd who was serving as VP of Cisco but has since become the CEO of Hyperloop. In 2012 the league began with eight teams, but currently consists of 22 teams in four divisions (East, South, Midwest, and West). Since the league's inaugural season, they have added 24 new teams and had 10 teams fold. Only two of the original eight teams remain in the league (Detroit Mechanix and Indianapolis AlleyCats). Each team plays a total of 14 regular season games on Friday, Saturday, or Sunday during the months of April through July. In late July there are playoffs in each division followed by a championship weekend held the first weekend in August. The AUDL uses the Discraft Ultrastar as the official game disc. The team funding comes from sources similar to those of other professional sports: sales of tickets, merchandise, concessions and sponsorship. In 2014, the league entered an agreement with ESPN to broadcast 18 games per season for a two-year period (with a third year option) on the online streaming service ESPN3. That contract was executed by Fulcrum Media Group.
There used to be a rival league named Major League Ultimate (MLU). Active between 2013 and 2016, it had eight teams, and was considered the main alternative to the AUDL, until it closed down. It used the Innova Pulsar as the official game disc.
In 2018, there was a planned mixed league called the United Ultimate League (UUL), but it did not come to fruition due to a lack of funding. The plan was to present an alternative to the AUDL, which at the time was dealing with a boycott related to gender equality. The UUL was supposed to be supported by crowd sourced funding, but the initial Kickstarter failed, raising only $23,517 of the $50,000 goal.
The Premier Ultimate League (PUL) was established in 2019. The league includes women and nonbinary players and hosts teams from the United States and until 2023, Colombia. The PUL is a 501(c)6 nonprofit that is operated by a board of directors that includes representatives from each of the participating teams. The mission of PUL is "to achieve equity in the sport of ultimate by increasing accessibility to and visibility of women* players through high-quality competition, leadership experiences, and community partnerships. Our league strives for gender, racial, and economic diversity in the sport of ultimate frisbee."
The Western Ultimate League (WUL) was established a year after the PUL in 2020. After successfully running a series of professional showcase games in collaboration with the AUDL in 2019, a group of team organizers in the western United States set their sites on joining the PUL in its second season. This coalition grew to include seven teams across the west and was ultimately too big of an expansion for the PUL as a second year league. The Western Ultimate League was established instead by the combined member teams: Seattle Tempest, Portland Swifts, Utah Wild, San Francisco Falcons, Los Angeles Astra, San Diego Super Bloom, and Arizona Sidewinders. The WUL works in collaboration with the PUL and has their sites set on a future merger. The first season of the WUL was cancelled in 2020 due to the COVID-19 pandemic and its inaugural season wasn't held until 2022. The Portland Swifts withdrew in 2020 and later the Oregon Onyx joined the league in 2022. The 2022 champions were the Seattle Tempest. A new team, Colorado Alpenglow, was added in October 2022 for the 2023 season, bringing the league up to 8 teams.
North American leagues
Regulation play, sanctioned in the United States by the USA Ultimate, occurs at the college (open and women's divisions), club (open, women's, mixed [male + female on each team], masters, and grandmasters divisions) and youth levels (in boys and girls divisions), with annual championships in all divisions. Top teams from the championship series compete in semi-annual world championships regulated by the WFDF (alternating between Club Championships and National Championships), made up of national flying disc organizations and federations from about 50 countries.
Ultimate Canada (UC) is the governing body for the sport of ultimate in Canada. Beginning in 1993, the goals of UC include representing the interests of the sport and all ultimate players, as well as promoting its growth and development throughout Canada. UC also facilitates open and continuous communication within the ultimate community and within the sports community and to organize ongoing activities for the sport including national competitions and educational programs.
Founded in 1986, incorporated in 1993, the Ottawa-Carleton Ultimate Association based in Ottawa, Ontario, Canada, claims to have the largest summer league in the world with 354 teams and over 5000 players as of 2004.
The Vancouver Ultimate League, based in Vancouver, British Columbia, Canada, formed in 1986, claims to have 5300 active members as of 2017.
The Los Angeles Organization of Ultimate Teams puts on annual tournaments with thousands of players.
There have been a small number of children's leagues. The largest and first known pre-high school league was started in 1993 by Mary Lowry, Joe Bisignano, and Jeff Jorgenson in Seattle, Washington. In 2005, the DiscNW Middle School Spring League had over 450 players on 30 mixed teams. Large high school leagues are also becoming common. The largest one is the DiscNW High School Spring League. It has both mixed and single gender divisions with over 30 teams total. The largest adult league is the San Francisco Ultimate League, with 350 teams and over 4000 active members in 2005, located in San Francisco, California. The largest per capita is the Madison Ultimate Frisbee association, with an estimated 1.8% of the population of Madison, WI playing in active leagues. Dating back to 1977, the Mercer County (New Jersey) Ultimate Disc League is the world's oldest recreational league. There are even large leagues with children as young as third grade, an example being the junior division of the SULA ultimate league in Amherst, Massachusetts.
Many other countries have their own regional and country wide competitions, which are not listed here.
There are over 12,000 student athletes playing on over 700 college ultimate teams in North America, and the number of teams is steadily growing.
Ultimate Canada operates one main competition for university ultimate teams in Canada: Canadian University Ultimate Championships (CUUC) with six qualifying regional events, one of which is the Canadian Eastern University Ultimate Championships (CEUUC).
There are also national teams participating in international tournament, both field and beach formats.
Yearly or twice-yearly national competitions are held.
In the US and other countries, the national teams are selected after a tryout process.
WFDF maintains an international ranking list for the national teams 
Hat tournaments are common in the ultimate circuit. At these tournaments players join individually rather than as a team. The tournament organizers form teams by randomly taking the names of the participants from a hat. This sort of procedure is an excellent way to meet people from all skill levels.
Many hat tournaments on the US west coast have a "hat rule" requiring all players to wear a hat at all times during play. If a player gains possession of the disc, yet loses her or his hat in the process, the play is considered a turnover and possession of the disc reverts to the other team.
However, in some tournaments, the organizers do not actually use a hat, but form teams while taking into account skill, experience, sex, age, height, and fitness level of the players in the attempt to form teams of even strength. Many times the random element remains, so that organizers randomly pick players from each level for each team, combining a lottery with skill matching. Usually, the player provides this information when he or she signs up to enter the tournament. There are also many cities that run hat leagues, structured like a hat tournament, but where the group of players stay together over the course of a season.
Common concepts and terms
- assist (or goal-assist)
- To throw the disc to a player who catches it in the endzone for a score.
- To make a play on a disc, usually by diving, jumping or performing some other athletic movement.
- To both cause the turnover and score the point.
- When a thrower completes a throw to the “break” side of the field. The break side of the field is the opposite direction of the force.
- When the pull goes out of bound, play starts at the sideline or the brick mark located in the center of the field 20 yards in front of the goal line the receiving team is defending. The offensive player picking up the disc signals that she or he wants to play from the brick mark by clapping hands above head.
- A defensive player catches the disc in the far end endzone while defending. This yields an immediate score for the defending team (akin to an own goal in other sports), as this endzone is their endzone to score in. Considered a very impressive achievement.
- A type of zone defense. Usually, 2-4 players (including a mark) all standing 10 feet from the thrower, and attempting to block the throwing lanes the thrower has.
- The direction the mark is trying to force the player with the disc to throw. Usually the force is towards one sideline or the other.
- A player extends her or his body horizontally towards the disc, ending up lying on the ground usually. This can happen offensively to catch a far or low disc, or defensively to hit the disc and force a turnover.
- Getting the defense or turnover.
- A player jumps to out of bounds for the disc, and while in the air throws back the disc to be caught inside the field of play.
- To throw the disc a long distance.
- The defender guarding the person throwing the disc.
- One player obstructs or screens a defensive player, preventing them from placing an effective guard on the player they are marking. Picks are against the rules and are generally accidental, and the player causing the pick may be an offensive or defensive player.
- To grab the disc in the air over the opponent.
- To throw the disc to the ground forcefully after scoring; borrowed from American football.
Competitions and leagues:
The Callahan award
- American Ultimate Disc League
- Beach Ultimate Lovers Association
- Deutscher Frisbeesport-Verband
- List of Ultimate teams
- Major League Ultimate
- Premier Ultimate League
- Ultimate Canada
- Ultimate in Japan
- U.S. intercollegiate Ultimate champions
- USA Ultimate
- Western Ultimate League
- World Flying Disc Federation
Other disc games:
- Currier Island, a fictional nation competing in national beach ultimate events
- "IOC Session receives updates on implementation of Olympic Agenda 2020". Olympic News. August 2, 2015. Retrieved March 1, 2017.
- "World Flying Disc Federation Receives Recognition by the International Olympic Committee". World Flying Disc Federation. May 31, 2013.
- Bethea, Charles (August 12, 2015). "Ultimate Frisbee's Surprising Arrival as a Likely Olympic Sport". The New Yorker. Condé Nast. Retrieved August 18, 2021.
- Eisenhood, Charlie (February 21, 2019). "Ultimate Misses Out On Paris 2024 Olympic Games". Ultiworld.
- "History of Ultimate". www.wfdf.org. Retrieved June 25, 2020.
- "What Is Ultimate?". USAUltimate.org. USA Ultimate. Retrieved January 14, 2015.
- "About Spirit of the Game". USAUltimate.org. Retrieved April 18, 2017.
- "Ultimate Frisbee Participation [SFIA]". Sludge Output. Retrieved January 14, 2014.
- "2019 World Under-24 Ultimate Championships". www.wfdf.org. Retrieved September 19, 2018.
- "wugc2016.com - Diese Website steht zum Verkauf! - Informationen zum Thema wugc2016". scores.wugc2016.com.
- "WFDF 2016 World Ultimate and Guts Championships (WUGC)". www.wfdf.org.
- Leonardo, Pasquale Anthony; Zagoria, Adam (2005). Seidler, Joe (ed.). Ultimate: The First Four Decades. Ultimate History Inc. ISBN 0976449609. Retrieved January 13, 2014.
- Sludge (November 7, 2020). "Sludge Output: 50th Anniversary of the First Interscholastic game of Ultimate (1970)". Sludge Output. Retrieved November 9, 2020.
- "Ultimate History – General". Retrieved January 23, 2015 – via Vimeo.com.
- Iacovella, Michael E. "An Abbreviated History of Ultimate". wfdf.org. Retrieved December 8, 2013.
- "Major Steps in History of Ultimate". WFDF.org. World Flying Disc Federation. Retrieved December 8, 2013.
- "Timeline of early history of Flying Disc Play (1871–1995)". WFDF.org. Archived from the original on June 20, 2012. Retrieved December 8, 2013.
- "History of the Frisbee". WFDF.org. Archived from the original on December 12, 2013. Retrieved December 8, 2013.
- "History of Ultimate Frisbee in Canada". Development of Frisbee in the US and Canada. May 11, 2019. Retrieved September 29, 2022. Note: The Canadian Open Frisbee Championships (1972) in Toronto Canada and the Vancouver Open Frisbee Championships (1974) along with the IFT Guts Frisbee tournament in Northern Michigan were the first tournaments to introduce Frisbee as a disc sport (up until then, the Frisbee was only used as a toy.
- "History of Frisbee and Flying Disc freestyle". Development of Frisbee in Canada. May 11, 2017. Retrieved October 6, 2017.
- "TUC History". Toronto Ultimate Club History. Retrieved December 3, 2014.
- "Special Merit: The "80 Mold"". USAUltimate.org. Retrieved December 8, 2013.
- "FPA Freestyle Disc Hall of Fame Pioneer Class Inductee Jim Kenner". Archived from the original on April 26, 2016. Retrieved April 10, 2016.
- "Ultimate Hall of Fame". USAUltimate.org. Retrieved March 10, 2016.
- "The Discraft Ultrastar (Class of 2011)". USAUltimate.org. Retrieved January 23, 2015.
- "When Wham-O Was King: Why The Innova V. Discraft Debate Is Old News". UltiWorld.com. March 18, 2013. Retrieved January 23, 2015.
- Holtzman-Conston, Jordan (2010). Countercultural Sports in America: The History and Meaning of Ultimate Frisbee. Waltham, Mass: Lambert Academic Publishing. ISBN 978-3838311951.
- Ring, Wilson (November 6, 2017). "Vermont first state to recognize 'ultimate' as varsity sport". Daily Hampshire Gazette. Associated Press. Archived from the original on May 1, 2018. Retrieved May 6, 2018.
- Mills, Stephen (February 12, 2018). "Watson to run unchallenged for Capital City mayor". Barre Montpelier Times Argus. Archived from the original on May 6, 2018. Retrieved May 6, 2018.
- Eisenhood, Charlie (November 3, 2017). "Vermont Becomes First State To Approve Ultimate As High School Varsity Sport". Ultiworld. Archived from the original on November 10, 2017. Retrieved May 6, 2018.
- Ball, Michael (February 12, 2020). "Scholarship Program Lands Oklahoma Christian Four Air Force Fifth Years". Ultiworld. Retrieved March 23, 2023.
- "History". College Championships. Retrieved March 23, 2023.
- "Davenport University to add ultimate frisbee for the 2023-24 season". Davenport University Athletics. Retrieved March 23, 2023.
- "Ultimate Canada [home page]". CanadianUltimate.com. Ultimate Canada. Retrieved May 15, 2013.
- "'Ultimate Frisbee' recognised by International Olympic Committee". BBC News. August 2, 2015.
- "Ultimate Frisbee recognized by International Olympic Committee". Sports Illustrated. Time Inc.
- "Ultimate Frisbee Rules | A Complete Players Guide 2020". Rules of Sports. May 8, 2020. Retrieved September 29, 2020.
- "Ultimate Frisbee Rules". DiscDish.org. May 25, 2021. Retrieved May 25, 2021.
- "Rules of Ultimate". USAUltimate.org. USA Ultimate. August 1, 2010. Retrieved August 7, 2019.
- "9. Stall count" (PDF). Wfdf.org. Archived from the original (PDF) on June 28, 2017. Retrieved January 2, 2018.
- "11th Edition Rules". www.usaultimate.org. Retrieved September 9, 2018.
- "20. Time-Outs". WFDF Rules of Ultimate. Retrieved September 9, 2018.
- "Ultimate". Wfdf.org. Retrieved September 13, 2015.
- "Rules of Ultimate | USA Ultimate". July 13, 2020.
- Bernardi, Volker. "WFDF approves transgender athlete policy". www.wfdf.org. Retrieved September 19, 2018.
- "Downloads | Ultimate | Rules of Play". Wfdf.org. Retrieved March 1, 2017.
- "2020-2021 Official Rules of Ultimate". USAUltimate.org. Archived from the original on March 17, 2020. Retrieved June 28, 2022.
- "Rules - The AUDL". Theaudl.com. Archived from the original on December 17, 2017. Retrieved January 2, 2018.
- "Freestyle the Ultimate Edge". August 25, 2014. Retrieved November 13, 2015.
- "Ultimate Frisbee Terms". DiscDish.org. May 10, 2021. Retrieved May 11, 2021.
- "Ultimate Terms and Lingo". Ultimate Frisbee HQ. Retrieved February 11, 2016.
- Nadeau, Ben (August 1, 2016). "CoachUp Nation | Excelling In The Horizontal Stack". Coachup.com. Retrieved March 1, 2017.
- "Horizontal Offense | Vancouver Ultimate League". Vul.ca. June 2014. Retrieved March 1, 2017.
- "Considering The Horizontal Stack: Are You Sure It's Right For Your Team?". Ultiworld.com. August 27, 2013. Retrieved March 1, 2017.
- "Ultimate Handbook". UltimateHandbook.com. Archived from the original on February 1, 2017. Retrieved March 1, 2017.
- "Ultimate Frisbee | American Football – The 4-1-2 'German' offense". Playspedia.com. Retrieved March 1, 2017.
- "Hexagon Offence". Felixultimate.com. April 14, 2016. Retrieved March 1, 2017.
- Westerfield, Ken. "The Art and Psychology of the Ultimate Pull". Ultimate Rob. Retrieved July 12, 2018.
- "What is a Pull in Ultimate Frisbee?". Disc Golf Warrior. May 1, 2020. Retrieved July 17, 2020.
- Rob, Ultimate (April 30, 2011). "Forcing in Ultimate – What Does it Mean?". Ultimate Rob. Retrieved March 1, 2017.
- "Basics". UltimateHandbook.com. Archived from the original on February 1, 2017. Retrieved March 1, 2017.
- "Mailbag with Mario: Playing Time, Defense, and Triangle Marking". Ultiworld.com. December 2014.
- Hordern, Tim (March 15, 2013). "Ultimate Frisbee Defensive Skills". TimHordern.com. Retrieved March 1, 2017.
- Ultimate, Flik (October 30, 2017). "Poaching". flikulti.com. Retrieved August 21, 2020.
- "The Cup: Defensive zone plays". Ultimate Frisbee HQ. Retrieved March 1, 2017.
- "Ultimate Handbook". UltimateHandbook.com. Archived from the original on February 1, 2017. Retrieved March 1, 2017.
- "Zone Defenses At College Nationals: A Reference Guide to Playing (and Beating) Junks". UltiWorld. May 19, 2014. Retrieved March 1, 2017.
- "Ultimate Frisbee | American Football – The Wall". Playspedia.com. Retrieved March 1, 2017.
- "Ultimate Frisbee | American Football – 1-3-3 Zone Defense". Playspedia.com. Retrieved March 1, 2017.
- "Junk defense - Ultipedia". March 7, 2007. Archived from the original on March 7, 2007. Retrieved January 2, 2018.
- "Ultimate Frisbee | American Football – Clam (5/50)". Playspedia.com. Retrieved March 1, 2017.
- "Ultimate Frisbee | American Football – Clam Zone Defense". Playspedia.com. Retrieved March 1, 2017.
- "Hasami –". flikulti.com. Retrieved May 10, 2020.
- "Flexagon Defence –". FelixUltimate.com. Retrieved March 1, 2017.
- "Spirit of the game". WFDF.org. Retrieved August 31, 2016.
- Gipson, Gregory (January 14, 2013). "Layout Abuse Alert!". Skyd Magazine. Retrieved June 13, 2021.
- USA Ultimate (August 9, 2021). YCC 2021, U-20 Girls Final: Eugene Downpour vs. D.C. Rogue. Blaine, Minnesota: YouTube. 68 minutes in. Retrieved August 27, 2021. Shows players taking a knee after an injury.
- "11th Edition Rules". USAUltimate.org. Archived from the original on June 4, 2014. Retrieved May 14, 2016.
- "Spring Reign (2015)". DiscNW. Retrieved August 31, 2016.
- "Basic Rules". WFDF.org. Archived from the original on July 14, 2014. Retrieved August 2, 2014.
- Earley, Mark. "Ultimate Interviews". UltimateInterviews.com. Archived from the original on May 5, 2012. Retrieved April 15, 2012.
- "UUL | United Ultimate League". Archived from the original on April 17, 2018. Retrieved June 28, 2022.
- "Play Ultimate". OCUA.ca. Ottawa Carleton Ultimate Association. Retrieved May 1, 2015.
- "About the Vancouver Ultimate League Society". VUL.ca. Vancouver Ultimate League. March 24, 2013. Retrieved March 1, 2017.
- "[Home page]". TUC.org. Toronto Ultimate Club. Retrieved March 8, 2013.
- "TUC History". Toronto Ultimate Club History. Retrieved March 29, 2013.
- Bock, Paula (July 24, 2005). "The Sport of Free Spirits". The Seattle Times Sunday Magazine. Retrieved August 28, 2008.
- "College Division". USAUltimate.org. Archived from the original on July 29, 2010. Retrieved March 1, 2017.
- "World Ultimate and Guts Championships 2016 (WUGC)". Archived from the original on July 8, 2017. Retrieved July 16, 2017.
- "News USA Ultimate Announces New Team Selection Procedures For WUGC". USAUltimate.org. December 8, 2014. Retrieved March 1, 2017.
- "World Rankings". Wfdf.org. Retrieved March 1, 2017.
- "Ultimate Field Locator – Ultimate Frisbee Pickup Games & Tournaments: Hat Tournament Rules". Ultimatefieldlocator.info. Retrieved March 1, 2017.
- "Ultimate Frisbee Terms". DiscDish.org. May 10, 2021. Retrieved May 18, 2021.
- "All Ultimate Frisbee Terms and lingo – C". The Ultimate HQ. Retrieved March 1, 2017.
- "Ultimate Frisbee Terms". DiscDish.org. May 10, 2021. Retrieved May 28, 2021.
- "Ultimate Frisbee Terms". DiscDish.org. May 10, 2021. Retrieved May 13, 2021.
- "All Ultimate Frisbee Terms and lingo – L". The Ultimate HQ. Retrieved March 1, 2017.
- "All Ultimate Frisbee Terms and lingo – G". The Ultimate HQ. Retrieved March 1, 2017.
- "Ultimate Frisbee Terms". DiscDish.org. May 10, 2021. Retrieved May 12, 2021.