The Average Umpire Is Almost 50. The Best Ones Might Be in Their 30s. - WSJ
MLB umpire Joe West has never missed a call. Just ask him - ESPN
MLB appoints 1st black umpire crew chief
In Defense of Umpires: Why Complaints About MLB's 'Ump Show' Problem Miss the Mark, News, Scores, Highlights, Stats, and Rumors
They Call 'Em Like They See 'Em - Twinkie Town
Umpire (baseball) - Wikipedia
Retired MLB umpire Dale Scott on coming out, Pride, and robo umps - Pinstripe Alley
MLB umpire Malachi Moore a trailblazer from Compton Youth Academy
MLB, Latino Umpire Probed by 2d Cir. About Minority Promotions
Observations of Umpires at Work – Society for American Baseball Research