Futures Game a perfect showcase for ball-strike challenge system
Robot umpires at home plate moving up to Triple-A for 2022
MLB catchers wary of looming robo umps amid rules changes
Robot Umpires Strike Zone: It's Not as Simple as You ThinkBaseball Prospectus
If Robot Umpires Stick Around, Will A New Strike Zone Follow? — College Baseball, MLB Draft, Prospects - Baseball America
Invasion of the Robot Umpires
Is baseball ready for robot umpires? We fielded an informal survey at the MLB All-Star Game in Seattle – GeekWire
Future Twins Weigh in on an Electronic Strike Zone - Twins - Twins Daily
Robot umpire: Baseball edges closer to implementing automatic strike zone in major leagues : r/baseball