MLB Umpire Microphones in Action as 2022 Season Nears - Crew Chief
Jeff Kellogg chosen as umpire crew chief for World Series
Beyond the grunt: Umpires mic up, and baseball changes a bit
World Series 2013: Umpire crew announced
Bill Miller (umpire) - Wikipedia
World Series umpire delivers flawless performance during Game 2
MLB: Umpires will announce review decisions to crowd
MLB appoints 1st black umpire crew chief
Will Expanded Instant Replay Lead To More Women Umpires
MLB hires first full-time umpire from Puerto Rico
MLB Umpires To Wear Microphones & Announce Replay Decisions To Fans
Dodgers-Diamondbacks NLDS umpires: Todd Tichenor is crew chief