The 1909 major league baseball season began on April 12, 1909. The regular season ended on October 7, with the Pittsburgh Pirates and Detroit Tigers as regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the sixth modern World Series on October 8 and ended with Game 7 on October 16. The Pirates defeated the Tigers, four games to three, capturing their first championship in franchise history. Going into the season, the defending World Series champions were the Chicago Cubs from the season.
In the National League, the Chicago Cubs had a record of 104âÂÂ49 but finished games behind the Pirates, setting a record for the most wins in an MLB regular season without reaching the postseason, which has only been equaled once, by the 1942 Brooklyn Dodgers, who had a record of 104âÂÂ50.
The 1909 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 14 with all but the Pittsburgh Pirates and St. Louis Cardinals playing. The American League would see its final day of the regular season on October 3, while the National League would see its final day of the regular season was on October 7. The World Series took place between October 8 and October 16.
The 1909 season saw the following rule changes:
An asterisk (*) denotes the departure from a ballpark mid-season.
23 tie games (13 in AL, 10 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 8 and ended on October 16 with the Pittsburgh Pirates defeating the Detroit Tigers in the 1909 World Series in seven games.
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<sup>1</sup> American League Triple Crown batting winner
The 1909 season saw two teams move to three new venues.