In sports, a winning percentage is the fraction of games or matches a team or individual has won. It is defined as wins divided by the total number of matches played (i.e. wins plus losses). A draw counts as a ½ loss and a ½ win. Winning percentage is one way to compare the record of two teams; however, another standard method most frequently used in baseball and professional basketball standings is games behind.
For example, if a team's season record is 30 wins and 20 losses, the winning percentage would be 0.6. If a team's season record is 28–16–5 (i.e., it has won twenty-eight games, lost sixteen and tied five times), the team has participated in 49 matches. The five tie games represent 2½ wins and 2½ losses, and so the team has an adjusted record of 30½ wins and 18½ losses, resulting in a .622 winning percentage.
In baseball, a pitcher is assessed wins and losses as an individual statistic and thus has his or her own winning percentage, based on his or her win–loss record. A pitcher's winning percentage is commonly expressed to three digits.
The name "winning percentage" is actually a misnomer, since a winning percentage, such as .536, is commonly not expressed as a percentage. The same value expressed as a percentage would be 53.6%. In leagues in which points are awarded for overtime losses, it is possible for a team to have a winning percentage above 0.500 (50%) despite losing more than half of the games it has played.
Some leagues and competitions may instead use a points percentage system, changing the nature of this statistic. In this type of method, used in many group tournament ranking systems, the competitors are awarded a certain number of points per win, fewer points per tie, and none for a loss. The teams are then ranked by the total number of these accumulated points. One such method is the "three points for a win", where three points are awarded for winning a game, one point is awarded for a draw, and no points are awarded for a loss. The National Hockey League (which uses an overtime and shootouts to break all ties) awards two points for a win in regulation or overtime/shootout, one point for an overtime loss, and none for a regulation loss.
Major League Baseball
|.798||67||17||1880||Chicago White Stockings||best pre-modern season|
|.763||116||36||1906||Chicago Orphans||best National League 154-game season|
|.721||111||43||1954||Cleveland Indians||best American League 154-game season|
|.716||116||46||2001||Seattle Mariners||best 162-game season|
|.250||40||120||1962||New York Mets||worst 162-game season (2 games rained out)|
|.265||43||119||2003||Detroit Tigers||worst 162-game season (no rainouts)|
|.248||38||115||1935||Boston Braves||worst modern National League season|
|.235||36||117||1916||Philadelphia Athletics||worst American League season|
|.130||20||134||1899||Cleveland Spiders||worst pre-modern season|
National Basketball Association
|.878||72||10||1995–96||Chicago Bulls||best 82-game season|
|.110||9||73||1972–73||Philadelphia 76ers||worst 82-game season|
|.106||7||59||2011–12||Charlotte Bobcats||worst season statistically|
National Hockey League
In the National Hockey League, teams are awarded two points for a win, and one point for either a tie (a discontinued statistic) or an overtime loss. It can be calculated as follows:
|.825||60||8||12||132||1976–77||Montreal Canadiens||best points % in post-expansion NHL|
|.131||8||67||5||21||1974–75||Washington Capitals||worst points % in post-expansion NHL|
- "Career Leaders and Records for Points Percentage (Goalie)". Hockey-Reference.com. Retrieved 24 May 2009.
- "2008–2009 – REGULAR SEASON – SUMMARY – POINT PERCENTAGE". NHL.com. Retrieved 24 May 2009.
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