| 1905 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) |
| Pennant winners | |
| AL champions | Philadelphia Athletics |
| AL runners-up | Chicago White Sox |
| NL champions | New York Giants |
| NL runners-up | Pittsburgh Pirates |
| World Series | |
| Champions | New York Giants |
| Runners-up | Philadelphia Athletics |
The 1905 major league baseball season began on April 14, 1905. The regular season ended October 8, with the New York Giants and the Philadelphia Athletics as regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the second modern World Series on October 9 and ended with Game 5 on October 14. The Giants defeated the Athletics, four games to one.