Professional football (gridiron)
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In the United States and Canada, the term professional football includes the professional forms of American and Canadian gridiron football. In common usage, it refers to former and existing major football leagues in either country. Currently (2009), there are multiple professional football leagues in North America: the three best known are the National Football League (NFL) and the Arena Football League (AFL) in the U.S. and the Canadian Football League (CFL) in Canada. The NFL has existed continuously since being so named in 1922.
Compared to the other major professional sports leagues of the United States and Canada, football has comparatively few levels of play and does not have a well-developed minor league system, either official or otherwise.
In North America, the top level of professional football is the National Football League, with the Canadian Football League second to the NFL in prominence and pay grade. Despite the lower level of play, the CFL has greater popularity in Canada because of its long history in the country, the lack of NFL teams in Canada (except the annual Bills Toronto Series game), and a general environment of Canadian cultural protectionism.
Indoor football has also developed in the United States, beginning with the Arena Football League, which formed in 1987. The AFL is the second longest running professional football league in the United States after the NFL, although its current incarnation is a separate entity from the original, which folded due to bankruptcy in 2008. From its debut until 1997, the Arena Football League operated with a monopoly on the indoor game, due to a broad interpretation that virtually all of the league's rules, collectively known as arena football, were covered under its patent; the Professional Indoor Football League successfully defeated the AFL's legal action against it in 1997, opening the possibility for other indoor football leagues to form. Only one significant aspect of the patent, the large rebound nets the AFL has used since its debut to keep balls in play, was fully protected; the patent expired in 2007, although no other professional indoor league has adopted rebound nets since. As of 2011, two national leagues (the AFL and the Indoor Football League), along with several regional professional and semi-pro leagues, are in operation. As of 2011, no professional indoor football league has had any significant presence in Canada (despite an abundance of hockey arenas that are ideal for the game); only one indoor team, the AFL's short-lived Toronto Phantoms (2000 to 2002), has ever played its games in Canada. The all-female Lingerie Football League is planning a Canadian expansion (including the Toronto Triumph, which began play in 2011), but that league is currently playing at the amateur level.
Up until the 1970s, semiprofessional and minor football leagues would often develop lower end players into professional prospects. Though there are still numerous teams at the semi-pro level in both the United States and Canada, they have mostly dropped to regional amateur status, and they no longer develop professional prospects, in part due to the rise of indoor football.
Though Japan (X-League) and Europe have professional football leagues composed primarily of national citizens, they are generally of a lower level of play than the Western Hemisphere counterparts, and they do not generally contribute players to North American leagues either.
Player development 
Professional football is considered the highest level of competition in gridiron football. Whereas most of the other major sports leagues draw their players from the minor leagues, the NFL currently draws almost all of its players directly from college football. College football, in turn, recruits players from high school football, with most potential stars receiving scholarships to play. The source for the vast majority of professional football players is the Division I Bowl Subdivision, with most coming from the six Bowl Championship Series conferences. Under current regulations, players must be at least three years removed from high school graduation to qualify to play in the NFL. Because of these barriers, players who do not play college football have very few options for breaking into the league.
The college football development system is a unique feature in the professional football system, stemming from the fact that the game of American football originated at the college level, unlike other sports that were products of independent clubs. Although ostensibly amateurs, college athletes are compensated with five years of free undergraduate college education (more than enough time to pursue a bachelor's degree), room and board for their time. As a result of the college system, first-time players (rookies) enter professional football older, more mature and more prepared for the professional game than players in other sports.
The Canadian Football League has a special requirement that a minimum of half of each team's roster be composed of persons who have lived in Canada since childhood. As such, Canadian Interuniversity Sport feeds players to the CFL to meet these quotas, much as the NCAA does in the United States. The remaining half of the roster may be filled by either Canadians or by imports (American players who play in the CFL).
The NFL has, over the course of its history, recruited rugby union, association football and Australian rules football players from other countries (particularly those who are retired from competition in their home countries) to play in the league, almost always as kickers and punters.
Broadcasting is an integral part of professional football. Not only does it provide the sport with exposure to an audience wider than just the audience attending at the stadium, but it can also provide revenue in the form of rights fees.
The NFL relies on television for nearly half of its revenue; this is in part because the league only plays one game each week, leaving fewer opportunities for ticket sales than the other professional sports (in turn, however, NFL stadiums have among the highest per-game attendance thanks to large stadium capacities, figures only exceeded or matched by some of the major college football teams and by the NASCAR Sprint Cup, both of which are also weekly events) and because the expense of the game (it has the largest rosters of any professional sport) makes the cost highly prohibitive. The NFL has sold broadcast rights to each of the major television networks, who pay large annual fees on top of the cost of production for the rights to air the game. The networks make back much of their money through advertising and retransmission consent fees. The use of multiple broadcasters dated to before the NFL's merger with the American Football League; each competing league had its own broadcaster, both of which kept the rights to their respective conference after the merger, while additional networks were sold showcase packages of once-a-week games held at night.
In Canada, where the threat of competing sports leagues is far less, the CFL opts instead for an exclusive contract with TSN, available only by subscription to a cable or satellite service, to carry all of the league's games. The CFL on TSN exclusive contract began in 2008; previously, like the NFL, it split its broadcasts up between two providers.
Other leagues have found it much more difficult to find an outlet on American television, much less one that pays a rights fee large enough to make it worthwhile. One of the reasons for the United Football League's failure was its having to pay for television coverage instead of being paid for the rights to it, along with its use of networks that were not widely available. Similarly, the Continental Football League only had one of its games televised nationally in its five-year existence, and the American Football Association blamed its failure on an inability to secure television coverage.
Virtually all professional football teams broadcast at least some of their games on local radio.
The rules of professional football are more likely to vary from league to league than the high school and college levels. Since interleague play is extremely rare, there is no need for a nationwide standard for all leagues, and each league will adopt and discard rules as they see fit. The Arena Football League had a patent on several of its rules that expired in 2007. Several professional leagues have experimented with rules in an effort to improve the quality of the game or to create a novelty. Nevertheless, the rules of professional football at the outdoor level are nearly identical to those at the high school and college levels, with some minor exceptions (such as the locations of hash marks, procedures for overtime, and the number of feet required to be in-bounds to catch a forward pass). Indoor football's rules are closely based on outdoor football but are heavily altered to compensate for the smaller field.
U.S. professional football history 
The first professional football player 
Professional football evolved from amateur "club" football, played by general interest athletic clubs or associations. These clubs began playing football in the 1880s, approximately ten years after the game took form in American colleges. Amateur club football established itself as a somewhat lower quality alternative to the more popular college football; some of the better teams would play against college teams. Eventually, some ostensibly amateur teams would secretly begin paying players a small sum to cover their expenses on an under-the-table basis, or arrange for amateur athletes to receive jobs in a company connected to the team (the Olympic Club of San Francisco, California is believed to have done the latter, thus creating the designation of "semi-pro" football in 1890, before football had gone professional); in most cases, the practice was within the rules of amateurism at the time.
The first record of an American football player receiving "pay for play" came in 1892 with William "Pudge" Heffelfinger's $500 contract to play in a game for the Allegheny Athletic Association against the Pittsburgh Athletic Club, with the second being Ben "Sport" Donnelly's $250 contract to play for the same team the next week; the sums were very large by the standards of the day, and like most payment arrangements, both players denied any payment ever took place for much of their lives. For several years afterwards, individual players and sometimes entire teams received compensation to play in "barnstorming" type games without rigid schedules and against a variety of opponents. John Brallier became the first open professional after accepting $10 to play for the Latrobe Athletic Association; Latrobe became the first all-professional club soon after. William Chase Temple would become the first man to directly bankroll a football team himself when he assumed "ownership" of the Duquesne Country and Athletic Club in either 1898 or 1899. Throughout the 1890s, the Western Pennsylvania Professional Football Circuit would act as the de facto major league (and, in fact, the only professional circuit) for football in the United States; it, like many of its successors, was not a "league" in the modern sense of a formalized organization, but rather an informal group of teams in free association with each other and any other team willing to play them.
The oldest existing professional football club is the Arizona Cardinals, a current member of the National Football League. The Cardinals organization, which was originally based on Racine Street in Chicago, has operated near-continuously since 1913, but counts an earlier team that played from 1898 to 1906 as part of its history. The Watertown Red & Black is the oldest semi-professional club, tracing its history to 1896.
Early leagues ~ 1902-1919 
While the practice of professional and semi-pro teams playing college and amateur teams was common in the 1890s, the Amateur Athletic Union began pressuring and threatening college teams with the loss of amateur status if they did so. Over the course of the first few years of the 20th Century, college and professional football began to diverge, until the NCAA formed in 1906, giving college football a separate sanctioning body. College-professional interplay effectively ended after the NCAA formed.
The next step in pro football stemmed from an unusual source: baseball. For reasons unknown, the champions of the two major leagues at the time declined to play in a World Series that year, as was custom. Instead, teams from each championship city (Pittsburgh and Philadelphia), three in all, received support from baseball teams in their cities and formed the National Football League (1902), the first all-professional league. The league hoped to draw fans by featuring stars such as Rube Waddell and Christy Mathewson touring Pennsylvania and New York. It was during this time that Blondy Wallace emerged as the biggest, and most controversial, name in professional football. The league didn't draw as many fans as hoped, but promoter Tom O'Rourke considered the league to be the best teams in America. O'Rourke brought a coalition of the two Philadelphia teams to his World Series of Football and immediately labeled them the favorite for the tournament. The "New York" team was upset by the Syracuse Athletic Club in the first round.
An agreement between the baseball leagues to form modern Major League Baseball led directly to the end of the first NFL. From there, professional football's focus moved west, as teams such as the Massillon Tigers and the short-lived Franklin Athletic Club went on buying sprees in an effort to defeat local teams. Massillon's buying spree led to the rise of the Ohio League, drawing much of the top professional football talent in America from Pennsylvania to Ohio, including Wallace, who signed with the Canton Bulldogs. Ohio pioneered the concept of playing games on Sundays to avoid competition with college football games; this was illegal in Pennsylvania (as well as New York City) due to still-existing blue laws, but eventually became the professional standard. A fabricated betting scandal, coupled with a lack of competitive games and increasing price tags, effectively ruined the Ohio League by 1907. Professional football took a step back as the Ohio League relied more on local, cut-rate talent, such as player-promoter George Parratt.
By 1915, however, when Canton signed superstar athlete Jim Thorpe to combat Parratt's successful squads, the bidding war was sparked again. However, the New York Pro Football League and other associations in the midwest (particularly Chicago) began competing at a level comparable to the Ohio League by 1919. New York, with future NFL teams such as Buffalo Prospects, Tonawanda Kardex, and Rochester Jeffersons, introduced the playoff tournament to professional football, resulting in Buffalo winning. Barnstorming tours between the circuits, along with the continuing bidding wars, led to the regional circuits forming connections and laying the groundwork for the first truly national professional league.
American Professional Football League/Association ~ 1920-1921 
A year after the Buffalo Prospects won the first Professional Football championship game, the Ohio League became the American Professional Football League in 1920. One month later, the league added the Buffalo Prospects and the Rochester Jeffersons, and changed its name to the American Professional Football Association (APFA). In an effort to expand beyond the midwest, the league staged a showcase game between Canton and Buffalo at the Polo Grounds in New York City (Buffalo won) in December 1920. The league did not have a championship game or playoff, setting its championship with a vote of the league owners. The Akron Pros had the best record in 1920, and the Chicago Staleys were the 1921 "champions," albeit not without controversy.
National Football League ~ 1922-1932 
In 1922, the APFA changed its name to the National Football League. While the Ohio League mostly ceased to exist after the foundation of the NFL (other than a few independent teams such as the Ironton Tanks and the pre-NFL Portsmouth Spartans), the other regional leagues continued. The New York league continued throughout the 1920s, outlasting many of the teams that it had contributed to the NFL, albeit without championships. 1924 saw the foundation of eastern Pennsylvania's Anthracite League, the last regional "major league." The Anthracite League was won by the Pottsville Maroons, who, after one year (and winning the league title), jumped to the NFL. The Anthracite League remanifested itself as the Eastern League of Professional Football, an explicitly minor league, in 1926 and 1927.
From 1922 through 1932, the NFL still declared as champions the team with the best record. There were no set schedules, and each team did not play the same number of games: some teams played against college or other amateur teams. The confusion reached a peak in 1925, when the aforementioned Maroons were hailed as the NFL champions by several newspapers after Pottsville defeated the Chicago Cardinals on December 6, even though there were still two weeks left in the season. This led to other teams scrambling to add extra games, including the Chicago Cardinals, who won two 'extra' games and claimed the championship. In the melee, the league cancelled games and suspended Pottsville's franchise. Through the 1920s, the smaller cities gave up on top-level pro football, while larger cities such as Boston, New York and Philadelphia saw teams take root there. This portion of the NFL's existence saw the admission of the Boston Braves, owned by George Preston Marshall who was to exert major positive and negative influences on the league.
First American Football League ~ 1926 
In 1926, teams from nine cities ranging from the New York Yankees to the Chicago Bulls to the Los Angeles Wildcats (actually based in Chicago) formed the first American Football League in competition with the NFL. Because of the 1925 shenanigans, the NFL's Rock Island Independents left the seven-year-old league to join the AFL. The major attraction of the new league was Red Grange of the Yankees, but the league folded after just one year, with the Yankees being absorbed into the NFL.
National Football League ~ 1933-1945 
In 1933, the league divided into the Eastern and Western divisions, and finally instituted a championship game between the division winners. Each team played from 10 to 13 games per season during this period, and by 1945, the league had two five-team divisions, with each team playing a 10-game regular season schedule. In 1936, to select and assign graduating college players to particular Pro teams, the first Professional Football 'entry draft' was held. The University of Chicago's Heisman Trophy-winning running back Jay Berwanger was selected first overall by the Philadelphia Eagles. However, Berwanger chose not to play Professional Football. The league was dominated by the Chicago Bears, Green Bay Packers, and New York Giants, with stars like quarterback Sid Luckman (Bears); and fullbacks Tuffy Leemans (Giants) and Clarke Hinkle (Packers). Even with the stellar fullback Cliff Battles, Marshall's team, now called the Redskins, was driven out of Boston in 1936 by a competing league, and he moved his franchise to Washington, DC as the Washington Redskins. Marshall introduced the marching band and a team song to Professional Football, along with other promotional efforts. However, he also refused to have black players on his team, and his influence resulted in the entire NFL excluding blacks after 1934. In 1939, NBC broadcast the first-ever televised Professional Football game from Ebbets Field, an October 22 contest between the Brooklyn Dodgers and the Philadelphia Eagles. There were two fixed monochrome iconoscope cameras and a single play-by-play commentator, Skip Walz.
Second American Football League ~ 1936-1937 
In 1936, a second American Football League of six teams was formed to challenge the NFL. It included another New York Yankees team, as well as the Cleveland Rams, the predecessor to today's St. Louis Rams. Future American Football League (1960–1969) coach and Hall of Famer Sid Gillman played his only year of Professional Football with the Rams. Before this AFL's second year, the Rams jumped to the NFL and were replaced by the first Professional Football team to actually play its home games on the West Coast, the Los Angeles Bulldogs, who had several stars including quarterback Harry Newman and end Bill Moore. The Boston Shamrocks, with all-star end Bill Fleming, outdrew the NFL's Redskins in 1936, causing George Preston Marshall to move the team to Washington. However the league as a whole could not compete, and folded after the 1937 season.
Also in 1936, the American Association was founded as a minor league. It played for five seasons, suspending operations for World War II, and returned under the "American Football League" name in 1946 before sputtering to a collapse in 1950.
Third American Football League ~ 1940-1941 
Still another try at an American Football League was made in 1940, with five franchises, including a third New York Yankees team. The league was the first major Professional Football league to complete a double round robin schedule, in which each team played each other twice. The onset of World War II and the resultant draft dried up the source of players for professional football and the new league did not have enough resources to continue.
All-America Football Conference ~ 1946-1949 
A year after World War II, another new Professional Football league was formed - the All-America Football Conference (AAFC). It attracted some of the nation's best football players and posed a serious challenge to the NFL. Like the pre-war AFL, it used a double round robin schedule. The league was dominated by a franchise owned and coached by Paul Brown: the Cleveland Browns, a team that would win the league's championship every year of its existence. The Browns featured players such as fullback Marion Motley, quarterback Otto Graham and kicker Lou Groza, while the San Francisco 49ers had running back Elroy 'Crazylegs' Hirsch and the Baltimore Colts (not related to today's Indianapolis Colts, which began play in Baltimore in 1953) fielded quarterback Y.A. Tittle.
Paul Brown made many innovations to the game on and off the field, including year-round coaching staffs, precision pass patterns, face masks, and the use of “messenger guards”. He was the first coach to film the opposition and break down those game films in a classroom setting, also attributed to him. While the NFL was still segregated, the AAFC's Browns became the first modern Professional Football team to sign black players.
Although many of its teams outdrew NFL teams, by 1949 the AAFC's costs had risen so steeply that the league agreed to a 'merger' with the NFL. It was more of a 'swallowing' of the AAFC, with only the Browns, 49ers, and Colts being admitted to the established league, even though the Buffalo Bills drew good crowds and raised funds from citizens to back the franchise. Players from the Bills and the other AAFC teams not 'merged' were distributed among the NFL teams. Motley, Graham, Groza, Hirsch and Tittle all starred in the NFL after the 'merger'.
Of the three AAFC teams that joined the NFL:
- The Colts lasted only one year in the NFL; the second Baltimore Colts were officially a new franchise launched in 1953, though tracing their history through a series of teams dating back to 1919, before the formation of the NFL.
- The Browns remained in Cleveland until their controversial move to Baltimore, becoming the Baltimore Ravens, for the 1996 season. The controversy was ultimately settled by granting Cleveland a new franchise, which began play in 1999, that took the Browns name and official lineage.
- The 49ers have remained in the NFL and San Francisco since their admission to the league. They are planning to move within the Bay Area media market to a new stadium in the Silicon Valley community of Santa Clara in 2014.
National Football League ~ 1946-1959 
Following five years of what the league perceived to be weak leadership on behalf of commissioner Elmer Layden (of Four Horsemen fame), league officials appointed Philadelpha Eagles owner-founder Bert Bell as commissioner in 1946.
After twelve years without black players in the NFL, the Los Angeles Rams added them in 1946, as they were required by their stadium lease to integrate the team. The league had two five-team divisions, each team playing an unwieldy 11-game schedule, with some teams playing more home games than others. They increased to twelve games the following year, partly because of the success of the rival AAFC's 14-game format. After the AAFC folded, the NFL added three of its teams, for a total of thirteen, but maintained the 14-game format. The first year after admitting the Cleveland Browns, the NFL was humbled by having the Browns, a team from what it had ridiculed as an inferior league, win its championship. The Browns went on to be NFL champions in three of their first six years in the league. In 1958, the Baltimore Colts defeated the New York Giants 10-3 in professional football's first sudden-death championship game,[clarification needed] and repeated the victory against the same team in the 1959 NFL title game, this time by a score of 31-16. The Colts had folded after the 1950 season and from 1951 through 1959 the NFL had twelve teams, six each in the East and West conferences. The league during this period featured not only star players absorbed from the AAFC 'merger' but others such as halfback Frank Gifford (New York Giants); the Philadelphia Eagles' quarterback Norm Van Brocklin and receiver Tommy McDonald; and the Colts' quarterback Johnny Unitas and running back Lenny Moore. Television coverage of the league was spotty, with some teams starting in 1950 to have individual arrangements with the Dumont Network and NBC. CBS began to televise selected NFL regular season games in 1956, but there was no league-wide, national television (the Browns, for instance, held out and syndicated games themselves until the early 1960s when a league-wide contract was imposed).
Fourth American Football League ~ 1960-1969 
By the start of the 1960s, the NFL was complacent in its dominance of the market for Professional Football fans, and had little incentive to expand that market. The AAFC was history, and the NFL had chosen not to capitalize on the boost it had received from the 1958 Colts-Giants sudden-death game. It was content with a 12-team league playing a 12-game schedule and featured "ball-control" football. When Texas oilmen Lamar Hunt and Bud Adams tried to purchase existing NFL franchises to move to Texas, or to establish new NFL franchises there, they were told that the conservative NFL was not interested. The result was that Hunt and Adams joined with six other businessmen to form the fourth American Football League (1960–1969). The league started out by signing half of the NFL's 1960 first-round draft choices including the Houston Oilers' Billy Cannon, and never slowed down. With future Hall of Fame Coaches Hank Stram (Dallas Texans/Kansas City Chiefs) and Sid Gillman (LA/San Diego Chargers) as well as others like the Buffalo Bills' Lou Saban, the league offered a more risk-oriented on-field approach that appealed to fans. The AFL also actively recruited from predominantly black colleges and other small colleges, a source the NFL virtually ignored. This led to a higher percentage of minority players, as well as several firsts, such as the first black number one draft choice (Buck Buchanan, Chiefs); the first black middle linebacker, Willie Lanier, Chiefs; and the first modern black starting quarterback (Marlin Briscoe, Broncos).
The AFL was similar to the AAFC in that it offered innovations, like a return to the double round robin schedule introduced by the earlier league and had eight teams in two divisions like the AAFC. The AFL also introduced official scoreboard clocks, player names on jerseys, the two-point PAT conversion and important off-the field elements such as gate and TV revenue-sharing and national TV contracts. The AFL developed the first ever cooperative television plan for professional football, in which the proceeds of the contract were divided equally among member clubs. ABC and the AFL also introduced moving, on-field cameras (as opposed to the fixed midfield cameras of CBS and the NFL), and were the first to have players "miked" during broadcast games.
But the American Football League was different from the AAFC in its overall competitive balance. While the Browns-dominated AAFC had had the same champion every year, six out of the Original Eight AFL teams won at least one AFL championship, and all but one played in at least one post-season game. In addition to traditional eastern cities, it placed teams in Texas, in the West with the Denver Broncos, Oakland Raiders and the Chargers, and eventually in the Midwest Kansas City and the deep South Miami. The league forced a merger with its rival, and made possible the Super Bowl. Although it lost the first two, by its demise it had beaten two NFL teams proclaimed as "the best in history" to win the final two World Championship games between two Professional Football league champions. The decade ended with the AFL retaining its original franchises, plus two expansion teams, and those ten teams represented the first time a major sports league had merged with another without losing a franchise.
The legacy of the American Football League is that virtually every aspect of today's wildly popular professional football, on and off the field, can be traced to innovations developed by the AFL and adopted by the NFL.
National Football League ~ 1960-1969 
The 1960 NFL had ten teams, only two south of Washington, DC and/or west of Chicago (the Los Angeles Rams and San Francisco 49ers), and none in the Southern United States, where college football still dominated. Though it had rebuffed efforts to move or expand, it immediately was put on the defensive by the new AFL, first causing the owners of the proposed Minnesota franchise in that league to renege for an NFL franchise to start in 1961, and immediately establishing the Cowboys in previously rejected Dallas, as competition to Hunt's Dallas Texans. The NFL also expanded its footprint by moving the Chicago Cardinals to St. Louis, Missouri in 1960. Later, it impeded the AFL's planned expansion to Atlanta by offering that city's investor the Falcons' NFL franchise. Ironically, the Falcons' replacement in the AFL were the Miami Dolphins who have appeared in five Super Bowls, winning two, while the Falcons were losers in their one appearance. Star NFL players during this period included the Browns' fullback Jim Brown; the Green Bay Packers' quarterback Bart Starr, fullback Jim Taylor and halfback Paul Hornung; halfback Gale Sayers of the Chicago Bears; Cowboys receiver Bob Hayes; the Philadelphia Eagles' and the Redskins' Charley Taylor. The AFL's influence on the NFL was evident in several ways: in 1962, the NFL emulated the junior league by arranging its own league-wide national television contract, with CBS; and late in the 'sixties, the NFL began recognizing the wide talent pool the AFL had tapped in small and predominantly black colleges, and it, too, started scouting and signing from those schools.
Tired of raids on players and escalating salaries, in the mid-1960s, certain NFL owners secretly approached AFL principals, seeking a merger of the two leagues. The merger was agreed to in 1966, with a championship game to be played between the league titlists, and a merged schedule beginning with the 1970 season, when existing TV contracts could be re-worked. The decade was dominated in the NFL by the Packers, who won four NFL titles, and by the mid-to late 1960s their head coach Vince Lombardi had fashioned a team that, with its ball-control style, would overpower the NFL and carry on to defeat AFL opponents in the first two AFL-NFL Championship Games after the 1966 and 1967 Professional Football seasons. The NFL champions in 1968, the Colts, and in 1969 the Minnesota Vikings, were each in turn considered to be "the best team in the history of the NFL." By 1969, the NFL had grown to 16 teams, with four teams directly attributable to the existence of the AFL: the Vikings, Cowboys, and Falcons, added to compete with the AFL, and the New Orleans Saints, who were added as a reward to Louisiana federal legislators for their support of PL 89-800, which permitted the merger. Likewise, the AFL-NFL wars brought two teams to Missouri (one in each league), marking the first time NFL teams had played in the state since the 1930s.
Minor Leagues ~ 1961 to 1973 
Concurrently with the AFL and NFL rivalry, several minor leagues thrived in this era as well. The United Football League lasted from 1961 to 1964 and was concentrated in the midwest. However, in 1962 it was quickly eclipsed by the Atlantic Coast Football League, which was run by the same people (the Rosentover family) as the previous American Association of the 1930s. When the UFL folded, and the Newark Bears of the ACFL unsuccessfully applied to join the AFL, two new leagues formed: the Professional Football League of America (PFLA), which ran from 1965 to 1967, and the more prominent Continental Football League (ContFL), which ran from 1965 to 1969. The ACFL lost three of its best teams to the ContFL, but survived. The ContFL and ACFL had different strategies: the ContFL had major-league aspirations, while the ACFL was happy as a developmental league and (like previous leagues run by the Rosentovers) allowed its teams to become farm teams to the AFL and NFL teams (for instance, the Hartford Knights were a farm team to the AFL's Buffalo Bills). The ContFL arguably had better talent that went on to NFL and CFL stardom (Ken Stabler, Don Jonas, and Sam Wyche), but folded after 1969, and plans to take on the CFL head-to-head were abandoned. The ACFL also produced some significant talent (e.g. Marvin Hubbard and the first female professional football player, placeholder Patricia Palinkas) and lasted longer, through 1971, with a return season in 1973. The attempted major World Football League sapped the ACFL of most of its talent, and forced it to fold prior to the 1974 season.
National Football League ~ 1970-1975 
In 1970, the NFL realigned into two conferences, with the Browns, Steelers and Colts joining the ten former American Football League teams in the American Football Conference and the remaining NFL teams forming the National Football Conference. The AFL's official scoreboard clock and jersey-back player names were adopted by the merged league, but the two-point PAT conversion was not adopted until 1994.
All American Football League records and statistics were accepted by the merged league as equivalent to pre-merger NFL records and statistics. Thus, a yard gained in the AFL in 1960 is as valid as a yard gained in the NFL in 1960. AFL All-Star Game selections and appearances are equivalent to NFL 'Pro Bowl' choices. They are equivalent, but, however, not identical, and this has caused errors in reporting by some sources. For example, John Hadl is listed in most on-line records as having been selected for the 1970 Pro Bowl, played after the 1969 Professional Football season. However, in 1970, there were both an NFL Pro Bowl and an AFL All-Star Game. Hadl, of the San Diego Chargers was MVP of the January 1970 AFL All-Star Game. The January 1970 NFL Pro Bowl was a different game, featuring only NFL players. Similar errors are made when players like the Oakland Raiders' Jim Otto are cited as having "fifteen years of NFL experience." In fact, Otto had ten years of AFL experience and five years of NFL experience, or fifteen years of Professional Football experience.
In 1974, the rival World Football League successfully lured several NFL stars to its upstart league, but collapsed midway through the 1975 season due to financial problems. The Memphis Southmen made an unsuccessful bid to join the NFL, even going as far as to file a lawsuit to attempt to force it, and the Birmingham Vulcans also raised ticket funds to attempt to do the same, but never got as far as Memphis. Neither city has an NFL franchise.
Also in 1974, the NFL, after over four decades of having its goal posts on the goal line (as Canadian football does), finally moved its goalposts back to the end line, as is the norm in high school and college football in the United States.
National Football League ~ 1976-1994 
In 1976, the NFL added the Seattle Seahawks and the Tampa Bay Buccaneers to the NFL. To accommodate the larger league, the schedule expanded from 14 games to its current length of 16 games in 1978. The playoff field was likewise expanded to ten teams, then again to twelve teams in 1990, where it has remained ever since.
The NFL began experiencing problems in the 1980s. Labor stoppages in 1982 (which led to the NFL season being cut in half) and 1987 (resulting in the league using replacement players for three games), combined with Al Davis winning a lawsuit to allow his team, the Raiders, to move from Oakland to Los Angeles against league wishes, forced NFL Commissioner Pete Rozelle into retirement. Paul Tagliabue was named his replacement.
The NFL backed the minor-league World League of American Football, a league based in the U.S., Canada, and Europe, which ran for two seasons. After its suspension, two American teams jumped to the Canadian Football League, though only one (the Sacramento franchise) would play in that league.
United States Football League ~ 1983-1985 
The United States Football League was the most significant challenger to the NFL since the American Football League, and the last of any significance to date. The USFL's gimmick was to avoid direct head-to-head competition with the NFL and college ball, and play in the spring. Originally intended as a minor league, this ended when several deep pocketed owners began luring top talent such as Herschel Walker to the USFL with high salaries.
The groundwork for what eventually led to the demise of the USFL was set mainly by Donald Trump, owner of the New Jersey Generals and a vocal opponent of the league's spring football concept, who led a coalition that sought to take the NFL on head-to-head with a fall schedule and later force a merger. This was a major problem for several teams, who were ill-prepared to face the NFL juggernaut, and fans quickly walked away from these lame-duck franchises when it became clear the USFL was done with spring football. The USFL pinned its hopes on an anti-trust lawsuit against the NFL; though the USFL won the case, it was a Pyrrhic victory, as the jury only awarded damages of US$3.
The USFL's biggest legacy was the fact that it helped develop some of the best quarterbacks in professional football during the 1990s. Many members of the prolific draft classes of 1983 through 1985 played in the USFL and went on to have strong careers in the NFL and CFL, including Steve Young, Jim Kelly, Doug Williams (who was actually drafted several years earlier, in 1978), Bobby Hebert and Doug Flutie.
Arena Football ~ 1987- present 
Immediately after the USFL suspended operations in 1986, USFL executive James F. "Jim" Foster began work on a brand new variant of football. Known as "arena football," the sport was played on a much shorter 50-yard field and was built heavily on a high-scoring offensive game. After two test games, he launched a professional league, the Arena Football League, in 1987. The AFL began its 24th season in 2011, and is currently the United States second longest running professional football league ever, after the NFL. The AFL also had a minor league, AF2, which ran for 10 seasons, from 2000 to 2009. The Arena Football League season runs from March to August, culminating with the ArenaBowl championship. In 2011, the AFL began an 18-game season with 18 teams.
The success of arena football led to a revival of interest in indoor football, particularly after the AFL lost a lawsuit over the extent of its patents in 1998. As of 2013, two other national leagues (American Indoor Football and the Indoor Football League) and five regional leagues play professional indoor football. One unusual variant of indoor football is the Lingerie Football League, in which scantily clad women play the game by a modified variant of indoor rules.
National Football League ~ 1995–2001 
The USFL's impact was not limited to players, however. The USFL apparently established Oakland, Baltimore, Jacksonville and Arizona as viable markets for professional football. As such, the St. Louis Cardinals moved to Phoenix, Arizona to become the Arizona Cardinals in 1988.
In 1993, the NFL began exploring expansion, eying one former NFL market (St. Louis), three USFL markets (Memphis, Baltimore, Jacksonville) and one former World Football League market (Carolina). The "Carolina Cougars" (later renamed Carolina Panthers) and Jacksonville Jaguars received franchises to begin play in 1995. At the same time, Al Davis, frustrated with Los Angeles, moved back to Oakland (another former USFL market), and Georgia Frontiere concurrently moved her Rams franchise to St. Louis, leaving Los Angeles with no NFL franchises for the 1995 season. Memphis did not receive a permanent franchise, and their proposal moved to the CFL, where it played for one year. Tennessee, however, did not end up empty-handed; the Houston Oilers moved to Nashville beginning in 1997, becoming the Tennessee Titans.
It was not until after the 1995 season, after Baltimore's CFL team won the Grey Cup, that Baltimore got a second look, this time from Art Modell, who took the core of his Cleveland Browns team to Baltimore to found the expansion Baltimore Ravens. The effort effectively killed the CFL's American expansion. The Browns returned, restocked with new players and with new ownership, in 1999.
The NFL revived the WLAF in 1995, this time headquartered solely in Europe, eventually changing the name of the league to the NFL Europe League (known as either NFL Europe or, in its last season, as NFL Europa, to avoid RAS syndrome). Originally having its teams spread across several countries including Spain, England, Scotland, the Netherlands and Germany, by the end of the league's run in 2007, only the Netherlands and Germany (the latter of which had five of the league's six teams) were still in the league.
Strained relations between the NFL and its players' union quieted down significantly in the 1990s, and the development of free agency as well as a salary cap led to peaceful relations between the two entities for over a decade. This was helped by new television contracts: in 1994, Fox Broadcasting Company set the tone for broadcast rights to the NFL when it outbid CBS for the right to air NFC games with an unheard-of bid of US$395,000,000. This brought total broadcast rights fees for the league to over US$1,000,000,000. In 1998, when CBS outbid NBC for the rights to the AFC, the total rights fees doubled to over US$2,000,000,000. This is in addition to the rights fee for NFL Sunday Ticket, a package offered exclusively to the DirecTV satellite television service, that began in the mid-1990s.
Several short-lived professional leagues arose in the wake of the dot-com boom in the late 1990s. The Regional Football League played one season in 1999, and the Spring Football League played only two weeks in 2000. The short-lived, highly-publicized and widely derided XFL played one season in the winter of 2001.
National Football League – 2002–present 
Also during this era, the league began expanding its influence overseas. Fútbol Americano, a one-off game in Mexico City, was the first regular-season game held outside the United States in 2005; it was followed by the NFL International Series, an annual game held in London on the last week of October since 2007. In an unrelated move, the Buffalo Bills began their Bills Toronto Series, playing an annual December game in Canada, in 2008. The Toronto series will run through 2012.
In 2003, the NFL launched its own in-house network, NFL Network. Beginning in 2006, at the end of the previous broadcast contract, the NFL launched an eight-game late-season package specifically for the network. The 2006 television contract expanded total annual broadcast rights to over US$3,000,000,000, and the 2011 renewal of those rights pushed the annual total to nearly US$5,000,000,000. Between 2006 and 2022, the networks will have paid the NFL nearly US$70,000,000,000—a total greater than the resale value of all thirty-two NFL teams combined.
The labor peace in the NFL came to a halt in 2010, when a group of NFL owners invoked an out clause in the league's collective bargaining agreement with the players' union, subsequently imposing a lockout in 2011. The players' association responded by disbanding and having its players sue the league for antitrust violations. The two sides came to an agreement in late July 2011, after one preseason game, that year's Pro Football Hall of Fame Game, was lost due to the lockout. The current collective bargaining agreement, which has no opt-outs, lasts through 2021.
Alternate leagues ~ 2009 - present 
The United Football League began play in 2009 with an abbreviated "Premiere Season" that featured four teams, two on each coast, in a six-week schedule. The UFL, which mostly featured former NFL players, marked the first professional fall league other than the National Football League to play in the United States since the World Football League in the mid-1970s. All UFL games aired on Versus and HDnet; every game was also webcast. The league returned in 2010 with a new expansion team in Omaha, Nebraska and an eight-game, ten-week schedule. From there, however, the UFL collapsed, cutting both its 2011 and 2012 seasons short after four weeks of play and failing to timely play most of its bills.
The Stars Football League began play as a four-team league on June 30, 2011, with an eight-week schedule. Numerous other professional leagues attempted to launch in the late 2000s and early 2010s, but never materialized, including the All American Football League and the United National Gridiron League.
Canadian Professional Football history 
Canadian football had similar origins to its American counterparts. Several Canadian professional teams are in fact older than the oldest existing American teams, because they began as amateur rugby organizations. The Canadian game evolved parallel to the American game, but several years behind: the Burnside Rules were adopted in 1905, and the forward pass (in place on the American side of the border since 1906) was adopted in 1929 after significant pressure from American coaches. The touchdown remained worth five points until 1956 (mainly due to Canadian pro football holding an American TV contract), whereas it had increased to six points in 1912 in the United States. Several relics of the old rules of the game, including goal posts on the goal line, a 110-yard field, more liberal rules for use of the drop kick, and only three downs, remain in the Canadian game.
Canadian football was, prior to the 1950s, dominated by three amateur organizations: the Ontario Rugby Football Union (ORFU), the Interprovincial Rugby Football Union (IRFU, or "Big Four"), and the Western Interprovincial Football Union (WIFU). By 1954, the IRFU and WIFU had gone professional (in part thanks to an American television contract from NBC that paid the Big Four more than the one DuMont was offering the NFL), and in that year the ORFU dropped out of competition for the decades-old Grey Cup, the championship of Canadian football. This is generally recognized as the moment that began the modern era of Canadian professional football. The WIFU and IRFU formalized an agreement creating the Canadian Football League in 1958, though inter-divisional play did not happen until 1961.
The CFL has been, at various times in its history, competitive with the NFL in terms of being able to acquire talent, though the league's self-imposed rule changes have hampered that in recent years (for instance, the marquee player exemption to the salary cap that once allowed CFL teams to sign one top-level player is no longer there, and the league has banned signing suspended NFL players). It has not been competitive on a team level with the NFL, as evidenced by the fact that in a series of interleague matchups between the IRFU and the NFL in the 1950s and 1960s, the NFL won all six matches. (The Hamilton Tiger-Cats, the best team in the IRFU at the time, did win one game against an American pro team in 1961, but it was an American Football League team, not an NFL team.)
The league attempted an American expansion in 1993, using a mix of a former World League team (Sacramento/San Antonio), a rejected proposed NFL franchise (Memphis), a spin-off of a Canadian team (Shreveport), and new expansion teams (Baltimore, Birmingham, Las Vegas), mostly based in the southern and western United States. Of the teams, only the Baltimore Stallions were both financially and competitively successful, and they were retconned into the Montreal Alouettes in 1996, while all the other American teams folded.
The two teams based in Ottawa and Montréal have been in flux for the past three decades. The original Alouettes folded in 1982; a Montreal Concordes team was founded the same year to replace them, but the Concordes (which renamed themselves the Alouettes in 1986) folded prior to 1987. The current Alouettes arrived in Montréal in 1996, absorbing the two previous Montréal teams' histories but disowning that of the team that formed its basis, the Baltimore Stallions. The Alouettes' situation has stabilized since that time. However, the Ottawa Rough Riders folded in 1996 after the team was torn in two by Bernard Glieberman as part of the American expansion experiment; the Ottawa Renegades were named as Ottawa's next CFL team from 2002 to 2005, but that team also folded, once again with Glieberman being involved. Jeff Hunt currently holds expansion rights to a third Ottawa CFL team as well as the rights to the Rough Riders, but that team was supposed to begin play in 2010 and has since been pushed back to 2013, due to stadium problems.
Outside of the problems in Ottawa and Montréal, and the ill-fated American expansion, the CFL has shown significantly more stability than the American leagues. The league has resisted expanding beyond its current nine teams and has, to date, never moved a Canadian team from one city to another. One particular market that has been a persistent topic of discussion has been the maritime provinces. The CFL approved an Atlantic franchise for Halifax known as the Atlantic Schooners in 1984 provided a stadium with sufficient capacity was built by then; however, no such stadium was ever built (the current largest stadium in Halifax, Huskies Stadium, only seats less than half of what CFL rules mandate). The Touchdown Atlantic series is a series of one-off games that are played in Atlantic region stadiums; the first, a preseason game, was held at Huskies Stadium in 2003. A follow-up game was scheduled for the same venue for 2006, but was canceled due to the Ottawa Renegades (who were to play in the game) folding. The series was revived as a regular season game in 2010, but instead at New Moncton Stadium in Moncton, which is much closer to the CFL's capacity guidelines.
Further reading