MLB computer plate umpires take step forward

Umpire (baseball) - Wikipedia

Baseball column: Rules, rules and more rules coming MLB's way, Sports

Bring on the robot overlords: robo-umps should be MLB's next big change

The umpire on the cusp of a watershed moment for baseball: 'I think she's going to do it' - The Athletic

Independent Atlantic League Becomes First US Professional Baseball League To Use 'Robot Umpires' - CBS Philadelphia

Computer Plate Umps Could Be Coming to the MLB Soon

If the ABS system comes to Triple-A, could MLB be far behind? - Blog

As MLB moves toward using 'robot umpire,' getting strike/ball calls right is the goal

MLB: Computerized Umpires?

MLB fans cry for ABS system. IronPigs say: Careful what you wish for

Robot umpires' debut in independent Atlantic League

An Electronic Umpire? Baseball Tried It (In the 1950s!) - The New York Times