Report - Umpires agree to MLB's test plans for automated strike zone - ESPN
Computer plate umps allowed in new labor deal
How can the MLB fix the poor ball and strike calls by home plate umpires? - Quora
Computer plate umps allowed in new labor deal - WENY News
MLB – MLBUA Agreement First Step Towards Automated Strike Zone
Column: MLB experimenting with robo-umpires in minors
Worcester Red Sox are preparing for robotic ball-strikes system coming
MLB experimenting rule changes in the minor league
Umpire school is just the beginning of the journey for students hoping to join MLB
AP Exclusive: Computer plate umps allowed in new labor deal
Why are there still umpires in Major League Baseball? Why can't it all be automated? - Quora
MLB Umpires Missed 34,294 Pitch Calls in 2018. Time for Robo-umps?, BU Today
AP Exclusive: Computer plate umps allowed in new labor deal
Umpire school is just the beginning of the journey for students hoping to join MLB