In baseball, a home run (abbreviated HR, also "homer", "dinger", "dong", "bomb", "blast", "goner" , "shot", or "four-bagger") is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home safely in one play without any errors being committed by the defensive team in the process. In modern baseball, the feat is typically achieved by hitting the ball over the outfield fence between the foul poles (or making contact with either foul pole) without first touching the ground, resulting in an automatic home run. There is also the "inside-the-park" home run, increasingly rare in modern baseball, where the batter reaches home safely while the baseball is in play on the field. When a home run is scored, the batter is also credited with a hit and a run scored, and an RBI for each runner that scores, including himself. Likewise, the pitcher is recorded as having given up a hit, and a run for each runner that scores including the batter.
Homeruns are among the most popular aspects of baseball and, as a result, prolific home run hitters are usually the most popular among fans and consequently the highest paid by teams—hence the old saying, variously attributed to slugger Ralph Kiner, or to a teammate talking about Kiner, "Home run hitters drive Cadillacs, and singles hitters drive Fords."
- 1 Types of home runs
- 2 Number of runs batted in
- 3 Specific situation home runs
- 4 History of the home run
- 5 Instant replay
- 6 See also
- 7 References
- 8 External links
Types of home runs
Out of the park
In modern times a home run is most often scored when the ball is hit over the outfield wall between the foul poles (in fair territory) before it touches the ground (in flight), and without being caught or deflected back onto the field by a fielder. A batted ball is also a home run if it touches either foul pole or its attached screen before touching the ground, as the foul poles are by definition in fair territory. Furthermore, many major-league ballparks have ground rules stating that a batted ball striking specific architectural features while in flight is a home run due to their location beyond the outfield wall.
A fielder is allowed to reach over the wall to attempt to catch the ball as long as his feet are on or over the field during the attempt. If the fielder successfully catches the ball while it is in flight the batter is out, even if the ball has already passed the vertical plane of the wall. However, since the fielder is not part of the field, a ball that bounces off a fielder and over the wall without touching the ground is still a home run. A fielder may not deliberately throw his glove, cap, or any other equipment or apparel to stop or deflect a fair ball, and an umpire may award a home run to the batter if a fielder does so on a ball that, in the umpire's judgment, would have otherwise been a home run (this is rare in modern professional baseball).
A home run accomplished in any of the above manners is an automatic home run. The ball is dead, even if it rebounds onto the field from striking a foul pole or an object beyond the outfield wall, and the batter and any preceding runners cannot be put out at any time while running the bases. However, if one or more runners fail to touch a base or one runner passes another before reaching home plate, that runner or runners can be called out on appeal, though in the case of not touching a base a runner can go back and touch it if doing so won't cause them to be passed by another preceding runner and they have not yet touched the next base (or home plate in the case of missing third base). This stipulation is in Approved Ruling (2) of Rule 7.10(b).
Inside-the-park home run
An inside-the-park home run occurs when a batter hits the ball into play and is able to circle the bases before the fielders can put him out. Unlike with an outside-the-park home run, the batter-runner and all preceding runners are liable to be put out by the defensive team at any time while running the bases. This can only happen if the ball does not leave the ballfield.
In the early days of baseball, outfields were relatively much more spacious, reducing the likelihood of an over-the-fence home run, while increasing the likelihood of an inside-the-park home run, as a ball getting past an outfielder had more distance that it could roll before a fielder could track it down.
With outfields much less spacious and more uniformly designed than in the game's early days, inside-the-park home runs are now a rarity. They are usually the result of a ball being hit by a very fast runner, coupled with an outfielder either misjudging the flight of the ball (e.g., diving and missing) or the ball taking an unexpected bounce. Either way, this sends the ball into open space in the outfield and thereby allows the batter-runner to circle the bases before the defensive team can put him out. The speed of the runner is crucial as even triples are relatively rare in most modern ballparks.
If any defensive play on an inside-the-park home run is labeled an error by the official scorer, a home run is not scored; instead, it is scored as a single, double, or triple, and the batter-runner and any applicable preceding runners are said to have taken all additional bases on error. All runs scored on such a play, however, still count.
An example of an unexpected bounce occurred during the 2007 Major League Baseball All-Star Game at AT&T Park in San Francisco on July 10, 2007. Ichiro Suzuki of the American League team hit a fly ball off the right-center field wall, which caromed in the opposite direction from where National League right fielder Ken Griffey, Jr. was expecting it to go. By the time the ball was relayed, Ichiro had already crossed the plate standing up. This was the first inside-the-park home run in All-Star Game history, and led to Suzuki being named the game's Most Valuable Player.
Number of runs batted in
Home runs are often characterized by the number of runners on base at the time. A home run hit with the bases empty is seldom called a "one-run homer", but rather a solo home run, solo homer, or "solo shot". With one runner on base, two runs are scored (the baserunner and the batter) and thus the home run is often called a two-run homer or two-run shot. Similarly, a home runs with two runners on base is a three-run homer or three-run shot.
The term "four-run homer" is seldom used; instead, it is nearly always called a "grand slam". Hitting a grand slam is the best possible result for the batter's turn at bat and the worst possible result for the pitcher and his team.
A grand slam occurs when the bases are "loaded" (that is, there are base runners standing at first, second, and third base) and the batter hits a home run. According to The Dickson Baseball Dictionary, the term originated in the card game of contract bridge. An inside-the-park grand slam is a grand slam that is also an inside-the-park home run, a home run without the ball leaving the field, and it is very rare, due to the relative rarity of loading the bases along with the significant rarity (nowadays) of inside-the-park home runs.
On April 23, 1999, Fernando Tatís made history by hitting two grand slams in one inning, both against Chan Ho Park of the Los Angeles Dodgers. With this feat, Tatís also set a Major League record with 8 RBI in one inning.
On July 29, 2003 against the Texas Rangers, Bill Mueller of the Boston Red Sox became the only player in major league history to hit two grand slams in one game from opposite sides of the plate. In fact, he hit three home runs in that game, and his two grand slams were in consecutive at-bats.
On August 25, 2011 the New York Yankees became the first team to hit three grand slams in one game vs the Oakland A's. The Yankees eventually went on to win the game 22–9, after trailing 7–1.
Specific situation home runs
These types of home runs are characterized by the specific game situation in which they occur, and can theoretically occur on either an outside-the-park or inside-the-park home run.
Walk-off home run
A walk-off home run is a home run hit by the home team in the bottom of the ninth inning, any extra inning, or other scheduled final inning, which gives the home team the lead and thereby ends the game. The term is attributed to Hall of Fame relief pitcher Dennis Eckersley, so named because after the run is scored, the losing team has to "walk off" the field.
Two World Series have ended via the "walk-off" home run. The first was the 1960 World Series when Bill Mazeroski of the Pittsburgh Pirates hit a 9th inning solo home run in the 7th game of the series off New York Yankees pitcher Ralph Terry to give the Pirates the World Championship. The second time was the 1993 World Series when Joe Carter of the Toronto Blue Jays hit a 9th inning 3-run home run off Philadelphia Phillies pitcher Mitch Williams in Game 6 of the series, to help the Toronto Blue Jays capture their second World Series Championship in a row.
Such a home run can also be called a "sudden death" or "sudden victory" home run. That usage has lessened as "walk-off home run" has gained favor. Along with Mazeroski's 1960 shot, the most famous walk-off or sudden-death homer would probably be the "Shot Heard 'Round the World" hit by Bobby Thomson to win the 1951 National League pennant for the New York Giants.
A walk-off home run over the fence is an exception to baseball's one-run rule. Normally if the home team is tied or behind in the ninth or extra innings the game ends as soon as the home team scores enough runs to achieve a lead. If the home team has two outs in the inning, and the game is tied, the game will officially end either the moment the batter successfully reaches 1st base or the moment the runner touches home plate—whichever happens last. However, this is superseded by the "ground rule", which provides automatic doubles (when a ball-in-play hits the ground first then leaves the playing field) and home runs (when a ball-in-play leaves the playing field without ever touching the ground). In the latter case, all base runners including the batter are allowed to cross the plate.
Lead-off home run
A lead-off home run is a home run hit by the first batter of a team, the leadoff hitter of the first inning of the game. In MLB, Rickey Henderson holds the record with 81 lead-off home runs. Craig Biggio holds the National League record with 53, second overall to Henderson.
In 1996, Brady Anderson set a Major League record by hitting a lead-off home run in four consecutive games.
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When two consecutive batters each hit a home run, this is described as back-to-back home runs. It is still considered back-to-back even if both batters hit their home runs off different pitchers. A third batter hitting a home run is commonly referred to as back-to-back-to-back, the most recent occurrence on opening day, April 4, 2016 when Denard Span, Joe Panik and Buster Posey of the San Francisco Giants hit back-to-back-to-back home runs off Ariel Pena of the Milwaukee Brewers.
Four home runs in a row by consecutive batters has only occurred eight times in the history of Major League Baseball. Following convention, this is called back-to-back-to-back-to-back. The most recent occurrence was on August 11, 2010, when the Arizona Diamondbacks hit four in a row against the Milwaukee Brewers in Miller Park as Adam LaRoche, Miguel Montero, Mark Reynolds and Stephen Drew homered off pitcher Dave Bush. Bush became the third pitcher to surrender back-to-back-to-back-to-back home runs, following Paul Foytack on July 31, 1963 and Chase Wright on April 22, 2007.
On August 14, 2008, the Chicago White Sox defeated the Kansas City Royals 9-2. In this game, Jim Thome, Paul Konerko, Alexei Ramírez, and Juan Uribe hit back-to-back-to-back-to-back home runs in that order. Thome, Konerko, and Ramirez blasted their homers off of Joel Peralta, while Uribe did it off of Rob Tejeda. The next batter, veteran backstop Toby Hall, tried aimlessly to hit the ball as far as possible, but his effort resulted in a strike out.
On April 22, 2007 the Boston Red Sox were trailing the New York Yankees 3–0 when Manny Ramirez, J. D. Drew, Mike Lowell and Jason Varitek hit back-to-back-to-back-to-back home runs to put them up 4–3. They eventually went on to win the game 7–6 after a three-run home run by Mike Lowell in the bottom of the 7th inning. On September 18, 2006 trailing 9–5 to the San Diego Padres in the 9th inning, Jeff Kent, J. D. Drew, Russell Martin, and Marlon Anderson of the Los Angeles Dodgers hit back-to-back-to-back-to-back home runs to tie the game. After giving up a run in the top of the 10th, the Dodgers won the game in the bottom of the 10th, on a walk-off two run home run by Nomar Garciaparra. J. D. Drew has been part of two different sets of back-to-back-to-back-to-back home runs. In both occurrences, his homer was the second of the four.
On September 30, 1997, in the sixth inning of Game One of the American League Division Series between the New York Yankees and Cleveland Indians, Tim Raines, Derek Jeter and Paul O'Neill hit back-to-back-to-back home runs for the Yankees. Raines' home run tied the game. New York went on to win 8–6. This was the first occurrence of three home runs in a row ever in postseason play. The Boston Red Sox repeated the feat in Game Four of the 2007 American League Championship Series, also against the Indians.
Twice in MLB history have two brothers hit back-to-back home runs. On April 23, 2013, brothers Melvin Upton, Jr. (formerly B.J. Upton) and Justin Upton hit back-to-back home runs. The first time was on September 15, 1938, when Lloyd Waner and Paul Waner performed the feat.
Simple back-to-back home runs are a relatively frequent occurrence. If a pitcher gives up a homer, he might have his concentration broken and might alter his normal approach in an attempt to "make up for it" by striking out the next batter with some fastballs. Sometimes the next batter will be expecting that and will capitalize on it. A notable back-to-back home run of that type in World Series play involved "Babe Ruth's called shot" in 1932, which was accompanied by various Ruthian theatrics, yet the pitcher, Charlie Root, was allowed to stay in the game. He delivered just one more pitch, which Lou Gehrig drilled out of the park for a back-to-back shot, after which Root was removed from the game.
Another notable pair of back-to-back home runs occurred on September 14, 1990, when Ken Griffey, Sr. and Ken Griffey, Jr. hit back-to-back home runs, off Kirk McCaskill, the only father-and-son duo to do so in Major League history.
On May 2, 2002, Bret Boone and Mike Cameron of the Seattle Mariners hit back-to-back home runs off of starter Jon Rauch in the first inning of a game against the Chicago White Sox. The Mariners batted around in the inning, and Boone and Cameron came up to bat against reliever Jim Parque with two outs, again hitting back-to-back home runs and becoming the only pair of teammates to hit back-to-back home runs twice in the same inning.
Consecutive home runs by one batter
The occurrence of individuals hitting home runs in consecutive at-bats is not unusual, but three or more is rare. If a player hits three home runs in a game, it is termed a hat-trick (which is also used for a player getting three strikeouts in a game). The record for consecutive home runs by a batter under any circumstances is 4. Of the sixteen players (through 2012) who have hit 4 in one game, six have hit them consecutively. Twenty-eight other batters have hit four consecutive across two games.
Bases on balls do not count as at-bats, and Ted Williams holds the record for consecutive home runs across the most games, 4 in four games played, during September 17–22, 1957, for the Red Sox. Williams hit a pinch-hit homer on the 17th; walked as a pinch-hitter on the 18th; there was no game on the 19th; hit another pinch-homer on the 20th; homered and then was lifted for a pinch-runner after at least one walk, on the 21st; and homered after at least one walk on the 22nd. All in all, he had 4 walks interspersed among his 4 homers.
In World Series play, Reggie Jackson hit a record three in one Series game, the final game (Game 6) in 1977. But those three were a part of a much more impressive feat. He walked on four pitches in the second inning of game 6. Then he hit his three home runs on the first pitch of his next three at bats, off of three different pitchers (4th inning- Hooten, 5th inning- Sosa, 8th inning- Hough). He had also hit one in his last at bat of the previous game, giving him four home runs on four consecutive swings. (His home run in game 5 was also hit on the first pitch, although this did not add to any significant streak.) The four in a row set the record for consecutive homers across two Series games.
In Game 3 of the World Series in 2011, Albert Pujols hit three home runs to tie the record with Babe Ruth and Reggie Jackson. The St. Louis Cardinals went on to win the World Series in Game 7 at Busch Stadium. In Game 1 of the World Series in 2012, Pablo Sandoval of the San Francisco Giants hit three home runs on his first three at-bats of the Series, also tying the record with Pujols, Jackson, and Ruth.
Home run cycle
An offshoot of hitting for the cycle, a "home run cycle" is where a player hits a solo, 2-run, 3-run, and grand slam home run all in one game. This is an extremely rare feat, as it requires the batter to not only hit four home runs in a game (which itself has only occurred 16 times in the Major Leagues), but also to hit those home runs with the specific number of runners already on base. Although it is a rare accomplishment, it is largely dependent on circumstances outside the player's control, such as his preceding teammates' ability to get on base, as well as the order in which he comes to bat in any particular inning.
Another variant of the home run cycle would be the "natural home run cycle", which would require a batter to hit a solo, 2-run, 3-run, and grand slam home run in that order.
Though multiple home run cycles have been recorded in collegiate baseball, the only home run cycle in a professional baseball game belongs to Tyrone Horne, who stroked four long balls for the minor league, Double-A Arkansas Travelers in a game against the San Antonio Missions on July 27, 1998.
On May 20, 1998, the Triple-A Indianapolis Indians performed a feat possibly never before duplicated in professional baseball. In the fifth inning of a game against the Pawtucket Red Sox, Indianapolis players hit for a "Homer Cycle". Pete Rose, Jr. opened the inning with a solo home run, Jason Williams connected for a 3-run shot, Glenn Murray slugged a grand slam, and Guillermo Garcia finished the scoring with a 2-run blast. The Indians won the game 11–4.
A major league player has come close to hitting for the home run cycle several times. Recent examples include:
- April 2, 1997, Tino Martinez of the New York Yankees, was a grand slam away from accomplishing this feat against his former team, the Seattle Mariners. He hit a 3-run home run in the first inning, a 2-run home run in the third inning and a solo shot in the fifth inning; all off starting pitcher Scott Sanders.
- April 26, 2005 Alex Rodriguez of the New York Yankees hit 3 home runs off Los Angeles Angels pitcher Bartolo Colón. Rodriguez hit a 3-run home run, 2-run home run, and a grand slam in the first, third, and fourth innings, respectively.
- May 16, 2008 Jayson Werth of the Philadelphia Phillies hit 3 home runs off Toronto Blue Jays pitchers David Purcey and Jesse Litsch. Werth hit a 3-run home run, a grand slam, and a solo home run in the second, third, and fifth innings, respectively.
- June 26, 2009, Andre Ethier of Los Angeles Dodgers hit a three-run home run off Jason Vargas in the second, a two-run home run off Roy Corcoran in the sixth, and a solo home run off Miguel Batista in the eighth inning in a game against Seattle Mariners.
- July 7, 2009, Paul Konerko of the Chicago White Sox hit a solo home run in the second inning off Cleveland Indians pitcher Jeremy Sowers, a grand slam in the sixth inning off reliever Chris Perez, and a two-run home run in the seventh inning off reliever Winston Abreu.
- August 1, 2009, Andrew McCutchen of the Pittsburgh Pirates hit a solo home run in the first inning, a two run home run in the fourth inning, and a three run home run in the sixth inning of a game against the Washington Nationals.
- September 17, 2010, Shin-Soo Choo of the Cleveland Indians, hit three home runs against the Kansas City Royals. Choo hit a 2-run homer in the fourth inning, a Grand Slam in the sixth inning and a solo home run in the eighth inning.
- June 21, 2015, J.D. Martinez of the Detroit Tigers, hit three home runs against the New York Yankees. Martinez hit a 2-run homer in the first inning, a solo home run in the fifth inning and a 3-run homer in the sixth inning
- August 21, 2015, Yoenis Céspedes of the New York Mets, hit three home runs against the Colorado Rockies: a grand slam in the second inning, a solo home run in the fourth inning, and a two-run home run in the sixth inning.
- August 29, 2015, Edwin Encarnación of the Toronto Blue Jays hit three home runs against the Detroit Tigers: a 3-run home run in the first inning, a 2-run home run in the sixth inning, and a grand slam in the seventh inning.
- September 26, 2015, Jarrett Parker of the San Francisco Giants hit three home runs against the Oakland Athletics: a solo home run in the second inning, a 2-run home run in the seventh inning, and a grand slam in the eighth inning.
History of the home run
In the early days of the game, when the ball was less lively and the ballparks generally had very large outfields, most home runs were of the inside-the-park variety. The first home run ever hit in the National League was by Ross Barnes of the Chicago White Stockings (now known as the Chicago Cubs), in 1876. The home "run" was literally descriptive. Home runs over the fence were rare, and only in ballparks where a fence was fairly close. Hitters were discouraged from trying to hit home runs, with the conventional wisdom being that if they tried to do so they would simply fly out. This was a serious concern in the 19th century, because in baseball's early days a ball caught after one bounce was still an out. The emphasis was on place-hitting and what is now called "manufacturing runs" or "small ball".
The home run's place in baseball changed dramatically when the live-ball era began after World War I. First, the materials and manufacturing processes improved significantly, making the now-mass-produced, cork-centered ball somewhat more lively. Batters such as Babe Ruth and Rogers Hornsby took full advantage of rules changes that were instituted during the 1920s, particularly prohibition of the spitball, and the requirement that balls be replaced when worn or dirty. These changes resulted in the baseball being easier to see and hit, and easier to hit out of the park. Meanwhile, as the game's popularity boomed, more outfield seating was built, shrinking the size of the outfield and increasing the chances of a long fly ball resulting in a home run. The teams with the sluggers, typified by the New York Yankees, became the championship teams, and other teams had to change their focus from the "inside game" to the "power game" in order to keep up.
Before 1931, a ball that bounced over an outfield fence during a major league game was considered a home run. The rule was changed to require the ball to clear the fence on the fly, and balls that reached the seats on a bounce became ground rule doubles in most parks. A carryover of the old rule is that if a player deflects a ball over the outfield fence without it touching the ground, it is a home run.
Also, until approximately that time, the ball had to not only go over the fence in fair territory, but to land in the bleachers in fair territory or to still be visibly fair when disappearing behind a wall. The rule stipulated "fair when last seen" by the umpires. Photos from that era in ballparks, such as the Polo Grounds and Yankee Stadium, show ropes strung from the foul poles to the back of the bleachers, or a second "foul pole" at the back of the bleachers, in a straight line with the foul line, as a visual aid for the umpire. Ballparks still use a visual aid much like the ropes; a net or screen attached to the foul poles on the fair side has replaced ropes. As with American football, where a touchdown once required a literal "touch down" of the ball in the end zone but now only requires the "breaking of the [vertical] plane" of the goal line, in baseball the ball need only "break the plane" of the fence in fair territory (unless the ball is caught by a player who is in play, in which case the batter is called out).
Babe Ruth's 60th home run in 1927 was somewhat controversial, because it landed barely in fair territory in the stands down the right field line. Ruth lost a number of home runs in his career due to the when-last-seen rule. Bill Jenkinson, in The Year Babe Ruth Hit 104 Home Runs, estimates that Ruth lost at least 50 and as many as 78 in his career due to this rule.
Further, the rules once stipulated that an over-the-fence home run in a sudden-victory situation would only count for as many bases as was necessary to "force" the winning run home. For example, if a team trailed by two runs with the bases loaded, and the batter hit a fair ball over the fence, it only counted as a triple, because the runner immediately ahead of him had technically already scored the game-winning run. That rule was changed in the 1920s as home runs became increasingly frequent and popular. Babe Ruth's career total of 714 would have been one higher had that rule not been in effect in the early part of his career.
Major League Baseball keeps running totals of all-time home runs by team, including teams no longer active (prior to 1900) as well as by individual players. Gary Sheffield hit the 250,000th home run in MLB history with a grand slam on September 8, 2008. Sheffield had hit MLB's 249,999th home run against Gio Gonzalez in his previous at-bat.
The all-time, verified professional baseball record for career home runs for one player, excluding the U. S. Negro Leagues during the era of segregation, is held by Sadaharu Oh. Oh spent his entire career playing for the Yomiuri Giants in Japan's Nippon Professional Baseball, later managing the Giants, the Fukuoka SoftBank Hawks and the 2006 World Baseball Classic Japanese team. Oh holds the all-time home run world record, having hit 868 home runs in his career.
In Major League Baseball, the career record is 762, held by Barry Bonds, who broke Hank Aaron's record on August 7, 2007, when he hit his 756th home run at AT&T Park off pitcher Mike Bacsik. Only seven other major league players have hit as many as 600: Hank Aaron (755), Babe Ruth (714), Alex Rodriguez (696), Willie Mays (660), Ken Griffey, Jr. (630), Jim Thome (612) and Sammy Sosa (609).
The single season record is 73, set by Barry Bonds in 2001. Other notable single season records were achieved by Babe Ruth who hit 60 in 1927, Roger Maris, with 61 home runs in 1961, and Mark McGwire, who hit 70 in 1998.
Negro League slugger Josh Gibson's Baseball Hall of Fame plaque says he hit "almost 800" home runs in his career. The Guinness Book of World Records lists Gibson's lifetime home run total at 800. Ken Burns' award-winning series, Baseball, states that his actual total may have been as high as 950. Gibson's true total is not known, in part due to inconsistent record keeping in the Negro Leagues. The 1993 edition of the MacMillan Baseball Encyclopedia attempted to compile a set of Negro League records, and subsequent work has expanded on that effort. Those records demonstrate that Gibson and Ruth were of comparable power. The 1993 book had Gibson hitting 146 home runs in the 501 "official" Negro League games they were able to account for in his 17-year career, about 1 homer every 3.4 games. Babe Ruth, in 22 seasons (several of them in the dead-ball era), hit 714 in 2503 games, or 1 homer every 3.5 games. The large gap in the numbers for Gibson reflect the fact that Negro League clubs played relatively far fewer league games and many more "barnstorming" or exhibition games during the course of a season, than did the major league clubs of that era.
Other legendary home run hitters include Jimmie Foxx, Mel Ott, Ted Williams, Mickey Mantle (who on September 10, 1960, mythically hit "the longest home run ever" at an estimated distance of 643 feet (196 m), although this was measured after the ball stopped rolling), Reggie Jackson, Harmon Killebrew, Ernie Banks, Mike Schmidt, Dave Kingman, Sammy Sosa (who hit 60 or more home runs in a season 3 times), Ken Griffey, Jr. and Eddie Mathews. In 1987, Joey Meyer of the Denver Zephyrs hit the longest verifiable home run in professional baseball history. The home run was measured at a distance of 582 feet (177 m) and was hit inside Denver's Mile High Stadium. Major League Baseball's longest verifiable home run distance is about 575 feet (175 m), by Babe Ruth, to straightaway center field at Tiger Stadium (then called Navin Field and before the double-deck), which landed nearly across the intersection of Trumbull and Cherry.
The location of where Hank Aaron's record 755th home run landed has been monumented in Milwaukee. The hallowed spot sits outside Miller Park, where the Milwaukee Brewers currently play. Similarly, the point where Aaron's 715th homer landed, upon breaking Ruth's career record in 1974, is marked in the Turner Field parking lot. A red-painted seat in Fenway Park marks the landing place of the 502-ft home run Ted Williams hit in 1946, the longest measured homer in Fenway's history; a red stadium seat mounted on the wall of the Mall of America in Bloomington, Minnesota, marks the landing spot of Harmon Killebrew's record 520-foot shot in old Metropolitan Stadium.
Replays "to get the call right" have been used extremely sporadically in the past, but the use of instant replay to determine "boundary calls"—home runs and foul balls—was not officially allowed until 2008.
In a game on May 31, 1999, involving the St. Louis Cardinals and Florida Marlins, a hit by Cliff Floyd of the Marlins was initially ruled a double, then a home run, then was changed back to a double when umpire Frank Pulli decided to review video of the play. The Marlins protested that video replay was not allowed, but while the National League office agreed that replay was not to be used in future games, it declined the protest on the grounds it was a judgment call, and the play stood.
In November 2007, the general managers of Major League Baseball voted in favor of implementing instant replay reviews on boundary home run calls. The proposal limited the use of instant replay to determining whether a boundary/home run call is:
- A fair (home run) or foul ball
- A live ball (ball hit fence and rebounded onto the field), ground rule double (ball hit fence before leaving the field), or home run (ball hit some object beyond the fence while in flight)
- Spectator interference or home run (spectator touched ball after it broke the plane of the fence).
On August 28, 2008, instant replay review became available in MLB for reviewing calls in accordance with the above proposal. It was first utilized on September 3, 2008 in a game between the New York Yankees and the Tampa Bay Rays at Tropicana Field. Alex Rodriguez of the Yankees hit what appeared to be a home run, but the ball hit a catwalk behind the foul pole. It was at first called a home run, until Tampa Bay manager Joe Maddon argued the call, and the umpires decided to review the play. After 2 minutes and 15 seconds, the umpires came back and ruled it a home run.
About two weeks later, on September 19, also at Tropicana Field, a boundary call was overturned for the first time. In this case, Carlos Peña of the Rays was given a ground rule double in a game against the Minnesota Twins after an umpire believed a fan reached into the field of play to catch a fly ball in right field. The umpires reviewed the play, determined the fan did not reach over the fence, and reversed the call, awarding Peña a home run.
Aside from the two aforementioned reviews at Tampa Bay, replay was used four more times in the 2008 MLB regular season: twice at Houston, once at Seattle, and once at San Francisco. The San Francisco incident is perhaps the most unusual. Bengie Molina, the Giants' catcher, hit what was first called a single. Molina then was replaced in the game by Emmanuel Burriss, a pinch-runner, before the umpires re-evaluated the call and ruled it a home run. In this instance though, Molina was not allowed to return to the game to complete the run, as he had already been replaced. Molina was credited with the home run, and two RBIs, but not for the run scored which went to Burriss instead.
On October 31, 2009, in the fourth inning of Game 3 of the World Series, Alex Rodriguez hit a long fly ball that appeared to hit a camera protruding over the wall and into the field of play in deep left field. The ball ricocheted off the camera and re-entered the field, initially ruled a double. However, after the umpires consulted with each other after watching the instant replay, the hit was ruled a home run, marking the first time an instant replay home run was hit in a playoff game.
- List of Major League Baseball annual home run leaders (by year)
- Major League Baseball single-season home run record
- Home Run Derby
- Babe Ruth Home Run Award
- List of lifetime home run leaders through history
- 500 home run club
- List of Major League Baseball career home run leaders
- List of Major League Baseball players with 20 doubles, 20 triples, and 20 home runs in the same season
- List of Major League Baseball players with 20 doubles, 20 triples, 20 home runs, and 20 stolen bases in the same season
- List of Major League Baseball single-game home run leaders
- List of Major League Baseball all-time leaders in home runs by pitchers
- List of Major League Baseball players with a home run in their first major league at bat
- List of Major League Baseball players with a home run in their final major league at bat
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- Although Major League Baseball recognizes these records as official, some baseball historians decline to accept records accumulated by players like Barry Bonds, Mark McGwire, Sammy Sosa and others with the alleged assistance of steroids or other performance-enhancing drugs
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- MLB's Home Run Leaders – batting statistics for over 16,000 players