The Average Umpire Is Almost 50. The Best Ones Might Be in Their 30s. - WSJ
MLB umpire job responsibilities
MLB notes: Umpires wear white wristbands to protest 'abusive player behavior' - Los Angeles Times
MLB umpire job responsibilities
Will robo umpires be the end of the game as we know it? (SB Nation Reacts) - AZ Snake Pit
Ten MLB Umpires Set To Retire Ahead Of The 2023 Season
Study Finds that Old Men with Experience are Actually the Worst MLB Umpires - FanBuzz
MLB appoints 1st black umpire crew chief
Observations of Umpires at Work – Society for American Baseball Research
Atlantic League introduces 'robot umpires' to baseball - The Washington Post
Umpire (baseball) - Wikipedia
MLB umpire Malachi Moore a trailblazer from Compton Youth Academy
Marlborough's Jim Reynolds calls it a career after 24 years as an MLB umpire - The Boston Globe
To The Fence Umpires At The Local Little League: Be Quiet & Watch
Sarah Thomas is set to officiate the Super Bowl. How long until a woman becomes an MLB umpire?