Jackie Robinson wasn't the only Black player to break barriers in MLB - The Washington Post
Jackie Robinson 75: Baseball's Re-Integration – Society for American Baseball Research
What happened to Jackie Robinson after baseball?
Jackie Robinson - Wikipedia
Jackie Robinson (U.S. National Park Service)
MLB honors Jackie Robinson Day and pays tribute to his barrier-breaking career
Baseball Hall of Fame Will Create New Exhibit on Race - The New York Times
How the Braves will honor Jackie Robinson Day in 2019
HeroVet Jackie Robinson, U.S. Army & Brooklyn Dodgers