Baseball 1920s By DC23NeujahrA Period: Jan 1, 1920 to Dec 31, 1930 Baseball 1920s Feb 13, 1920 Negro leagues began May 1, 1920 Longest baseball game every played between the Brooklyn Dodgers and Boston Braves. Game ended due to darkness. Jan 1, 1921 Rules Changed: no more trick pitches Jan 1, 1923 Yankee Stadium was built Jan 1, 1925 Babe Ruth made 1920s the golden age for baseball