2003 MLB season
|Regular Season||March 30-September 28, 2003|
|Postseason||September 30-October 25, 2003|
|← 2002 • MLB seasons • 2004 →|
The 2003 MLB season ended when the Florida Marlins defeated the New York Yankees in a six-game World Series. The Detroit Tigers set the American League record for losses in a season, with 119, and the Marlins became the first team to win the championship twice as a wild card.