This collection is organized chronologically starting in 1887 to 1915. It then skips to 1919, the late 1920s, the 1930s and ends with the late 1940s. These files include season statistics, rosters and game accounts. Certain files will have a breakdown of the pitching or position statistics by certain teams such as Brockton, Haverhill or New Bedford. Brockton is featured heavily in this collection between 1907 and 1913. In the last box of this collection, there are yearly statistics from a variety of leagues, miscellaneous notes, correspondence and newspaper clippings.