Some Helpful Websites

Negro Leagues Baseball eMuseum
Extensive player profiles, with stats first, then personal history. Includes pictures. Also, lots of info about teams by state. A project of the Kansas State University College of Education
 
Negro League Baseball
Contains Player Profiles for major players in the negro leagues, as well as information on teams.
 
Blackbaseball's Negro Baseball Leagues
Lengthier articles about teams and players, as well as book suggestions if you are interested in more.
 
Negro League Baseball Players Association
Brief articles about many players on the leagues.