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Robot umpire: Baseball edges closer to implementing automatic strike zone in major leagues
Robot Umpires in Baseball: A Terrible Idea
Independent Atlantic League Becomes First US Professional Baseball League To Use 'Robot Umpires'
Robot umpires' debut in independent Atlantic League
Robot umpires are coming to Atlantic Baseball League
What is a strike in baseball? Robots, rule book and umpires view it differently
Robot umpires will continue to be used in Atlantic League for remainder of 2019 season
Robot umpires debut in independent Atlantic League - The Tribune
Robot umpires not likely to get MLB call-up for 2024 - NBC Sports