MLB makes history by naming its first black and Latino-born umpire

MLB Umpire Bios

22 all-star books about California baseball including the Dodgers, Angels, Padres and more – Orange County Register

Minnie Miñoso, MLB's first Black Latino star, was a baseball pioneer

Umpire Angel Hernandez loses racial discrimination lawsuit against MLB

What Made Emmett Ashford, Major League Baseball's First Black Umpire, an American Hero, Arts & Culture

Baseball Umpires in 1921 – Society for American Baseball Research

Baseball - Wikipedia

Milt Pappas, Cagey All-Star Traded for Hall of Famer, Dies at 76 - The New York Times

MLB appoints 1st black umpire crew chief

Satchel Paige - Wikipedia