Who is Angel Hernandez? Umpire who's sued MLB in middle of many kerfuffles
MLB umpires to make announcements on replay reviews for first time
Major League Baseball's worst call ever: Expanding instant replay - Los Angeles Times
MLB umpires to use microphones to announce replay review decisions - Sports Illustrated
MLB umpires will have a new view this season -- on Zoom
MLB fans will be able to watch interactions between umpires and replay center with new technology
Umpires might get microphones to explain video reviews, and nothing can possiblie go wrong
They Call 'Em Like They See 'Em - Twinkie Town
Dale, we know you're gay.' How a Major League Baseball umpire came out - Outsports