<p>Baseball's top minor leagues are switching to an <u>all-challenge system</u> for their test of robot umpires. <br>Major League Baseball has been experimenting with the automated <u>ball-strike system</u> in the minor leagues since 2019.<br>It has been used at all Triple-A ballparks this year for a second straight season, the robot alone for the first three games (of each series) and a human with a challenge system in the final three.<br>Starting June 25th, only the challenge system will be used, according to a memo sent Tuesday from MLB to <u>farm directors</u> and Triple-A managers. <br>I'm Gethin Coolbaugh.</p>
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