MLB Rule Changes: Atlantic League Tests Tweaks Meant to Save Baseball - Bloomberg
It's a Really Weird Time to Be an Umpire - The New York Times
Robot Umpires Strike Zone: It's Not as Simple as You ThinkBaseball Prospectus
SportTechie's 2019 Outstanding Innovation: Automated Strike Zones
Instant replay in Major League Baseball - Wikipedia
MLB umpires get support from players in 'perfectly imperfect' game
MLB Hitters May Regret a Future in Which Robot Umpires Rule the Game
Robot umpire: Baseball edges closer to implementing automatic strike zone in major leagues : r/baseball
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
MLB umpires get support from players in 'perfectly imperfect' game
The Pitch That Killed: Mike Sowell: 9781938545429: : Books
In baseball, does the strike zone box, we see on TV, record balls and strikes more accurately than the home plate umpire? - Quora
How accurate are MLB umps? Meet the BU junior keeping score. - The Boston Globe
Robot Umpires Advocated By Chicago Cubs' Ben Zobrist