Robot umpires' make independent league baseball debut

Major League Baseball tests robot umpires Arizona Fall League

Robo-umps reach Triple-A, but MLB rollout still uncertain

Independent baseball league to try robot umpires

Robot Umpires Are Ready. Can Baseball Handle This Curveball?

Robot umpires will continue to be used in Atlantic League for remainder of 2019 season

Baseball's 'robot umpires' to debut in the Atlantic League and you may not notice the difference – Hartford Courant

Steal first base? Robot umpires? Gauging reaction to the Atlantic League's experimental rules – The Morning Call

Now Calling Balls and Strikes: Robot Umpires - WSJ

MLB on track to expand robot umps to all Triple-A ballparks

MLB 2020 Should Have Been the Season of the Robot Umpire