Jackie Robinson's MLB Debut Bothered the Negro Leagues' Best Players

October 2, 1946: Jackie Robinson leads Montreal to thrilling 10-inning victory over Louisville – Society for American Baseball Research

History of the Negro Leagues, Part 3 - Royals Review

Jackie Robinson Day: A look at his first 10 days in the big leagues - Sports Illustrated

Jackie Robinson's contract bought by the Brooklyn Dodgers, becomes first black player in major league baseball – New York Daily News

Jackie Robinson in 1945: From Boston 'Tryout' to a Negro Leagues Star – Society for American Baseball Research

The Breakthrough: In May 1947 Jackie Robinson proved he belonged in the bigs - Sports Illustrated

Why Was Oscar Charleston Forgotten?

What position did Jackie Robinson play in Major League Baseball (MLB)? And what team did he start for? - Quora

Walter O'Malley : Features : Jackie Robinson and the O'Malley Family : Page 1

The story of honoring Negro League history and a search for buried treasure

Jackie Robinson: Biography, Baseball Player, Activist

3. Race & Baseball After Jackie Robinson - Yogi Berra Museum & Learning Center