Retrosheet Official Web PageComplete play-by-play data for all AL and NL seasons from 1919 - 2022.
Play-by-play data have also been released for most games for the 1913 - 1918 seasons.
Box-score data have been compiled for the 1871, 1872, and 1874 NA seasons and the 1901 - 1912 AL and NL seasons.
Negro League data have been compiled for the 1940 - 1948 seasons. In addition, Negro League data have been compiled for several hundred notable games played prior to 1940.