With its latest release, Retrosheet has released games for the last nine seasons for which the Negro American League (NAL) and the second Negro National League (NN2) have been recognized as major leagues (by MLB, SABR, and others): 1940 - 1948. The last of these seasons was, in fact, the last season in the history of the Negro National League.
You should read here for some discussion of the data that are being made available by Retrosheet for Negro League games. Data can be downloaded here.
Retrosheet website last updated December 6, 2023.
All data contained at this site is copyright 1996-2023 by Retrosheet. All Rights Reserved. Click here for information about the use of Retrosheet data