How Well Did MLB's Experimental Minor League Rules Work? - The Ringer
Umpire school is just the beginning of the journey for students hoping to join MLB
MLB umpires agree to cooperate with developing computer plate umps
MLB umpires willing to let computers call balls and strikes: report
MLB umpires agree to electronic strike zone testing and development for 'robot umps' in new union deal
World Series ump crew youngest in years, nod to K-zone tech
MLB testing new technology during games to help settle balls vs. strikes conflicts - ABC News
A New Study Shows Umpire Discrimination Against Non-White Players - Baseball ProspectusBaseball Prospectus
MLB testing new technology during games to help settle balls vs. strikes conflicts - ABC News
Las Vegas Aviators to test Automated Ball and Strike system in 2022, Aviators
Computer plate umps allowed in new labor deal - WENY News
MLB umpires agree to allow computerized strike zone: report – New York Daily News
What do robo-umps, challenge system mean for catchers? Some coaches are concerned
Explaining ball-strike challenge system
Computer plate umps allowed in new labor deal