Observations of Umpires at Work – Society for American Baseball Research
Curtis Goodwin Complains, Steals Second While Mic'd Up (729)
Umpire Training: Plate Basics: The Slot (Part 2)
Incredible video of a mic'd-up umpire shows the manic emotion when a player gets ejected
WS2014 Gm5: Home plate umpire mic'd up during Game 5
Robot umps: Bad umpiring overshadows World Series Game 5 - Sports Illustrated
Home plate umpire gerry davis hi-res stock photography and images - Alamy
Las Vegas Aviators to test Automated Ball and Strike system in 2022, Aviators
MLB umpire job responsibilities
Yankees manager Aaron Boone goes off on rookie umpire in home-plate tirade after ejection