This article is about the 1927 Major League Baseball season only. For information on all of baseball, see 1927 in baseball.
The 1927 Major League Baseball season began on April 12, 1927. The regular season ended on October 2, with the Pittsburgh Pirates and New York Yankees as the regular season champions of the National League and American League, respectively. The postseason began with Game 1 of the 24th World Series on October 5 and ended with Game 4 on October 8. The Yankees swept the Pirates in four games.
The 1927 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 1904 season (except for 1919) and would be used until 1961 in the American League and 1962 in the National League.
Opening Day took place on April 12 with all but all but the Detroit Tigers and St. Louis Browns playing. The final day of the regular season was on October 2. The World Series took place between October 5 and October 8.