The 1930 major league baseball season began on April 14, 1930. The regular season ended on September 28, with the St. Louis Cardinals and Philadelphia Athletics as the regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the 27th World Series on October 1 and ended with Game 6 on October 8. The Athletics defeated the Cardinals, four games to two, capturing their fifth championship in franchise history, winning back-to-back World Series.
Offense dominated this season. The National League batted .303, with six teams batting better than .300. The American League came in at .288, with three teams batting over .300.
The 1930 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 since the season (except for ) and would be used until in the American League and in the National League.
American League Opening Day took place on April 14 with the Boston Red Sox and Washington Senators playing, while National League Opening Day took place the following day. The final day of the regular season was on September 28, which saw all sixteen teams play on the final day for the first time. The World Series took place between October 1 and October 8.
The 1930 season saw the following rule changes:
An asterisk (*) denotes the ballpark a team played the minority of their home games at
2 tie games (0 in AL, 2 in NL), which are not factored into winning percentage or games behind (and were often replayed again) occurred throughout the season.
The Chicago Cubs and Philadelphia Phillies had two tie games each.
The postseason began on October 1 and ended on October 8 with the Philadelphia Athletics defeating the St. Louis Cardinals in the 1930 World Series in six games.
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<sup>1</sup> American League Triple Crown pitching winner
<sup>2</sup> All-time single-season runs batted in record
Across 76 homes games, the Boston Red Sox played their Saturday, April 19 doubleheader against the New York Yankees, Friday, July 4 doubleheader against the Philadelphia Athletics, as well as all 16 of their Sunday games at the Boston Braves home field of Braves Field (the remaining 56 home games were played at Fenway Park). This was the 2nd of three consecutive seasons playing all Sunday games at Braves Field and 2nd of four consecutive season playing some games at Braves Field.