The 1956 Major League Baseball season was contested from April 17 to October 10, 1956, featuring eight teams in the National League and eight teams in the American League. The 1956 World Series was a rematch of the previous year's series between the New York Yankees and the Brooklyn Dodgers. The series is notable for Yankees pitcher Don Larsen's perfect game in Game 5.
December 6–8 – Major League owners meet in Chicago. Cleveland general manager and minority-owner Hank Greenberg proposed implementing limited Interleague play beginning in 1958. Under Greenberg's proposal, each team would continue to play 154-games in the season, 126 of which would be within the league, and 28 against the eight clubs. The interleague games would all be played during a period immediately following the All-Star Game. The proposal was not adopted.