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, pitchers are assessed wins and losses as an individual statistic and thus have 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, a lesser amount of points per tie, and none for a loss. The teams are then ranked by the total amount 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 a 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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