They Call 'Em Like They See 'Em - Twinkie Town
How 'robot umpires,' automated strike zone will work at Principal Park
Robo umps reach Triple-A, but MLB rollout still uncertain - The San Diego Union-Tribune
Robot Umpires Strike Zone: It's Not as Simple as You ThinkBaseball Prospectus
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
Do Umpires Dream of Electronic Strikes?, News, Scores, Highlights, Stats, and Rumors
MLB News: Umpire gets ejected from baseball game by fellow umpire after heated argument with player
Computer Plate Umps Could Be Coming to the MLB Soon
Meet the AI that could replace your baseball umpire - CNET
Game Changers: An electronic strike zone?
Home Plate Umpires ARE Being Replaced By Computers
Imperfections And All, Robo Umps Make Significant Impact — College Baseball, MLB Draft, Prospects - Baseball America