Why is MLB baseball predominantly white? - Quora
The Real Story of Baseball's Integration That You Won't See in 42 - The Atlantic
Black Americans Who Loved and Changed the Game of Baseball
Integrating Baseball, before Jackie Robinson - JSTOR Daily
How politics played a major role in the signing of Jackie Robinson
Then Again: The 1st Black pro baseball player briefly starred on a Montpelier team - VTDigger
Before The NBA Was Integrated, We Had The Black Fives : Code Switch : NPR
Legacy: Integration of baseball led to demise of Negro Leagues
MLB vs. Florida: When the league protested segregated living quarters during spring training
Baseball Integration Timeline, by John Thorn
The Secret History Of Black Baseball Players In Japan : Code Switch : NPR
Breaking Barriers: The History of Black Ballplayers in Japan, Part II
Black players in organized white baseball in the pre-integration era - Beyond the Box Score