Before Brooklyn: the secret heroes who helped break baseball's color barrier, MLB

Before Jackie: Baseball's Color Line – Society for American Baseball Research

No, baseball doesn't have a diversity problem – New York Daily News

Jackie Robinson: A Spiritual Biography by Michael G. Long, Chris Lamb - Ebook

Before Brooklyn: The Unsung Heroes Who Helped Break Baseball's Color Barrier: Reinstein, Ted: 9781493051212: : Books

MLB players and management hold talks as Monday deadline looms, MLB

Clyde Sukeforth, the man who discovered Jackie Robinson and Roberto Clemente, is the Forrest Gump of baseball - ESPN

Cold Warrior: The Jackie Robinson Story – Society for American Baseball Research

Before Brooklyn: The Unsung Heroes Who Helped Break Baseball's Color Barrier: Reinstein, Ted: 9781493051212: : Books

Jackie Robinson, the Hero, in '42' - The New York Times