| 1945 MLB season | |
|---|---|
| League | American League (AL) National League (NL) |
| Sport | Baseball |
| Duration | Regular season:
|
| Number of games | 154 |
| Number of teams | 16 (8 per league) |
| Regular season | |
| Season MVP | AL: Hal Newhouser (DET) NL: Phil Cavarretta (CHC) |
| AL champions | Detroit Tigers |
| AL runners-up | Washington Senators |
| NL champions | Chicago Cubs |
| NL runners-up | St. Louis Cardinals |
| World Series | |
| Champions | Detroit Tigers |
| Runners-up | Chicago Cubs |
The 1945 major league baseball season began on April 17, 1945. The regular season ended on September 30, with the Chicago Cubs and Detroit Tigers as the regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the 42nd World Series on October 3 and ended with Game 7 on October 10. The Tigers defeated the Cubs, four games to three. It would prove to be the Cubs' last appearance in a World Series until the 2016 World Series.
The scheduled 13th Major League Baseball All-Star Game was cancelled due to wartime travel restrictions in World War II.