Umpire (baseball) - Wikipedia
World Series umpire salaries: How much do MLB umpires get paid for 2022 World Series games?
AP sources: MLB umpire tests positive for virus, crews shift, Taiwan News
Phillies' J.T. Realmuto on ejection from spring game: 'It was a soft way to get thrown out
Adrian Beltre's nemesis named crew chief for World Series umpires
MLB Umpires announced for 2015 League Championship Series – The Denver Post
Major League Umpires
MLB appoints 1st black umpire crew chief
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
Dan Iassogna - Wikipedia
Kerwin Danley to be named first African-American crew chief - NBC Sports