Ten MLB Umpires Retiring, Most Since 1999
MLB umpire Dale Scott: 'I wasn't intimidated by threats to out me as gay', MLB
Home plate umpires are getting better. Will that hold off the robots?
Dom Amore: From Andy Baylock's intro course in umpiring at UConn, Jim Reynolds, Dan Iassogna have risen to rank of MLB crew chief – Hartford Courant
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MLB makes history by naming its first black and Latino-born umpire crew chiefs
Angel Hernandez is the Worst Umpire in MLB History
Minnesota woman chooses longest road to major leagues: umpiring
Sources - 10 MLB umps retiring, most since '99 - ESPN
May 31, 1999: When umpire Frank Pulli spontaneously pioneered MLB replay review and took away a homer
MLB umpire retirements, promotions
The Umpire Is Out: Calling the Game and Living My True Self: Scott, Dale, Neyer, Rob, Bean, Billy: 9781496230447: : Books