<ul data-eligibleForWebStory="false"><li>MLB will test a robot umpire system at the next All-Star Game where teams can challenge rulings using an automated ball-strike system.</li><li>Human umpires will still make the initial calls, but teams will have two opportunities to challenge a call using the ABS system as backup.</li><li>The ABS challenge system allows pitchers, catchers, or hitters to request a challenge immediately after a pitch by tapping their hat or helmet for the umpire to review.</li><li>MLB sees the ABS challenge system as a compromise between tradition and technology, adding a strategic element to the game, and potential implementation in regular baseball seasons.</li></ul>

MLB will test its robot umpire system at the next All-Star Game

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