Elston Howard - Wikipedia
The Secret History Of Black Baseball Players In Japan : Code Switch : NPR
Marlins Name McKeon, 80, as Interim Manager - The New York Times
Black Players Lift Cubs To First Post-Jackie Robinson Era World Series Win
MLB appoints first black and Latino-born umpire crew chiefs
Baseball - Wikipedia
April 11, 1966: Emmett Ashford makes history as first Black umpire in American League – Society for American Baseball Research
Baseball Umpires in 1921 – Society for American Baseball Research
It's a Really Weird Time to Be an Umpire - The New York Times
The Latin-born managers in Major League Baseball history