Baseball's replay system is breaking. How can it be fixed?
World Series ump crew youngest in years, nod to K-zone tech
Robot Umpires: Coming Soon To A Major League Baseball Diamond Near You?
MLB Rumors: Umpires Association Agrees To Testing & Development Of Automated Strike Zone In New Deal
Robot umps would change game for Gary Sanchez
Rage against the machines: MLB stars don't want to see robot umps
Are robot umpires ready for their MLB debut? Not so fast. - The Athletic
Report: Umps agree to cooperate with electronic strike-zone testing
JAY DUNN: Could Major League Baseball move to a hybrid strikezone – Trentonian