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.
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 1904 season. This format would last until 1919.
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.
For the first time in Major League history, two teams with over 100 losses played each other, when the Brooklyn Superbas (100 losses) and Boston Beaneaters (100 losses) met in their final series of the season.[17]