MLB names first Black and Latino born umpire crew chiefs – Pro Player Insiders
Cuban American ump Laz Diaz promoted, Boricua Roberto Ortiz makes history - Our Esquina
MLB Umpire: Kerwin Danley becomes the first black crew chief
MLB shuffles umpiring staff, appoints 1st Puerto Rican full-time ump
Abe Streep, Author at The Atavist Magazine
MLB umpires flock to Pastor Dean to be baptized - ESPN The Magazine
Carlson, Márquez, Miller and Tichenor will be the umpire crew chiefs for MLB Division Series
GSA Spotlight: Ball State's Ryan Brown
MLB makes history by naming its first black and Latino-born umpire crew chiefs
Cuban American ump Laz Diaz promoted, Boricua Roberto Ortiz makes history - Our Esquina
History of baseball in the United States - Wikipedia