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.
The 1905 schedule consisted of 154 games for all teams in the American League and National League, each of which had eight teams. Each team was scheduled to play 22 games against the other seven teams of their respective league. This continued the format put in place for the season. This format would last until .
Opening Day took place on April 16 with all but the Detroit Tigers and Cleveland Naps playing. The final day of the regular season was on October 8. The World Series took place between October 9 and October 14.
Blue laws restricted Sunday activities in several localities, causing the Detroit Tigers, in a rescheduled game, to play at a ballpark in a different locality.
19 tie games (11 in AL, 8 in NL), which are not factored into winning percentage or games behind (and were often replayed again), occurred throughout the season.
The postseason began on October 9 and ended on October 14 with the New York Giants defeating the Philadelphia Athletics in the 1905 World Series in five games.
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<sup>1</sup> American League Triple Crown pitching winner
<sup>1</sup> National League Triple Crown pitching winner<br> <sup>2</sup> Modern (1901âÂÂpresent) single-season losses record
The Washington Senators' American League Park was renamed to National Park.
Due to horse races at main home ballpark, Bennett Park, the Detroit Tigers played two games at Neil Park in Columbus, Ohio, home of the Class A minor league Columbus Senators, on July 23 and 24.