One-game playoffs were used in
Major League Baseball (MLB) through the 2021 season. When two or more MLB teams were tied for a division championship or the
wild card playoff berth (1995–2011, or starting in 2012, the second only) at the end of the regular season, a one-game playoff was used to determine the winner. If a tie were (from 1995 to 2011) a two-way tie for a division championship and both tied teams' have records higher than those records of the second-place teams in the other divisions, or (from 2012) between the two division non-champions with the untied best record, no one-game playoff was played. In this scenario, the winner of the season series between the two teams wins the tiebreaker for purposes of playoff seeding. Through the
2008 season, home-field advantage for one-game playoffs was determined by a
coin flip, but effective from , home advantage was based on a set of performance criteria, with the first tiebreaker being head-to-head record. For statistical purposes, one-game playoffs were considered part of the regular season. In a 162-game regular season, a one-game playoff was often referred to as “game 163”. The result of the playoff was included in the regular season standings and individual player statistics were included along with the statistics for the rest of the season. One significant playoff-like deviation from normal regular season games in force was that six-man
umpire crews were used (as opposed to the four-man crews of the regular season). Also, television broadcasting rights for all were negotiated by MLB – from 2012 to 2021, the network owning the rights to the
Wild Card Game for a particular league has also had the rights to any tiebreaker(s) that might occur in that league. MLB scheduling practices stipulated a break of at least one day between the scheduled end of the regular season and the start of the postseason. The schedule was designed to maximize the probability that tiebreakers could take place on the day after the scheduled end of the regular season with no alterations to the postseason schedule needing to be made as a result. Nevertheless, the schedule could have been disrupted if rain-outs or other such events disrupted the schedule near the end of the season or on the day set aside for tiebreakers, and the tie-breaking procedure and scheduling would have become more complicated if three or more teams had tied.
History Through the 2013 MLB season, there have been 14 occasions where a tiebreaker was needed in a league, division, or wild card race. Of these tiebreakers, ten have been one-game playoffs and the other four were best-of-three playoffs. Prior to the advent of divisional play in 1969, the National League broke ties for its league championship with a best-of-three-games playoff – incidentally, all four of these series were ultimately won by the team that won the first game. The American League has always used one-game playoffs. Prior to the advent of the wild card playoff system in 1994, all five pennant playoffs in the National League had involved the
Brooklyn/Los Angeles Dodgers (who won the coin toss for home field advantage all five times, yet lost every year except 1959), and both American League playoffs had involved the
Boston Red Sox (who hosted both and lost both). The 2018 season was the first to see two one-game playoffs, both for division titles (the NL Central and NL West) – the first time divisional one-game playoffs were needed at all since the MLB postseason expanded to ten teams. Both were in the National League and meant that the Game 163 winners won the division and advanced to the LDS, while the losers met each other in the
Wild Card Game. Under the pre-2012 format, only the NL West tiebreaker would have been played since the NL Central runner-up would have been assured the Wild Card. It was the first time that the loser of a tiebreaker game still qualified for the postseason.
No playoff needed Since the advent of the wild card in 1995, there have been three occasions on which a tiebreaker was not played as the two teams that were tied for a division lead and the wild card. In
2001, the
Houston Astros and
St. Louis Cardinals tied for first in the
National League Central with records of 93–69. In
2005, the
New York Yankees and
Boston Red Sox each finished 95–67 in the
American League East. In
2006, the
San Diego Padres and
Los Angeles Dodgers finished tied with records of 88–74 in the
National League West. The team with the better head-to-head record (the 2001 Astros, 2005 Yankees, and 2006 Padres) was declared the division champion, thus receiving a better seed in the postseason. The other team was seeded as the wild card. Since 2012, when the
Wild Card Game was introduced, if two teams are tied for the first Wild Card spot, no tie-breaking game was played. Rather, both teams simply played each other in the Wild Card Game, with the team winning the regular season series hosting the Wild Card Game. This has occurred in 2012 (
Baltimore Orioles and
Texas Rangers were both 93–69; Texas hosted the game due to winning the season series 5–2), 2014 (
Pittsburgh Pirates and
San Francisco Giants were both 88–74; Pittsburgh hosted due to winning the season series 4–2), 2016 (
Baltimore Orioles and
Toronto Blue Jays were both 89–73; Toronto hosted due to winning the season series 4–3; also
San Francisco Giants and
New York Mets were both 85–77; New York hosted due to winning the season series), and 2021 (
New York Yankees and Boston Red Sox were both 92–70; Boston hosted due to winning the season series 10–9). Previously, these matchups would have served as tiebreaker games.
Make-up games On some occasions a previously postponed game may be made up at the end of the season to settle entry into the playoffs. Although such a game is technically a mere regular-season game, it can have the effect and feel of a playoff. On September 23, 1908,
Johnny Evers of the
Chicago Cubs capitalized on a base-running mistake by young
Fred Merkle of the
New York Giants to invalidate a game-ending winning run. As thousands of fans were on the field and darkness was approaching, the game did not immediately resume. As it turned out, the
Cubs and
Giants ended the season in a tie for the pennant, and the postponed game was replaced by a new game played on October 8, 1908, at the
Polo Grounds. The Cubs prevailed 4–2, and advanced to the
1908 World Series. In
2008, the
Chicago White Sox ended the season game behind the
Minnesota Twins for the
American League Central division title. The fractional difference was due to the September 13 game between the White Sox and the
Detroit Tigers, which had been rained out and not yet rescheduled. To determine whether, if the game had not been rained out, there would have been a tie between the Twins and White Sox, the White Sox and Tigers played the make-up game at the end of the season on September 29. The White Sox won, resulting in a tie that necessitated playing a one-game playoff in Chicago, which the White Sox won 1–0. Make-up games were also played after the season's end in
1973 and
1981. This scenario was almost required in 2006 had the
Astros won their final game of the season against the
Braves. The
Cardinals, who won the NL Central despite only playing 161 games, would have been required to play a makeup game in
San Francisco in this case as their September 17 game against the Giants was postponed (and subsequently canceled after the Cardinals won the division). The Cardinals would have won the division in the case of this makeup game victory, but a tiebreaker game against Houston would have been required had they lost. Between 1901 and 1938, during a time when games were more often delayed by darkness and not always made up, there have been at least nine occasions on which making up postponed games might have resulted in a different pennant outcome, but the games were not made up. Even today, make-up games that cannot be played before the scheduled end of the regular season are only played if there is a possibility their results could affect postseason qualification. ==National Football League==