1905 Major League Baseball season
| 1905 MLB season | |
|---|---|
| League | American League (AL) National League (NL) |
| Sport | Baseball |
| Duration | Regular season:
|
| Games | 154 |
| 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, capturing their first modern championship in franchise history.
Stung by criticism from fans and writers for his team's refusal to play in the previous season's World Series, Giants owner John T. Brush drafted rules during the offseason to formally establish the World Series as a compulsory event. Both leagues then adopted the agreement in mid-February 1905.