ABS challenge system

MLB's automated ball-strike challenge system is set to feature in 2026, and ESPN has launched a tracker ranking how teams and players fare with challenges of umpire calls. The system lets players contest ball and strike decisions reviewed by tracking technology, and the tracker will follow which clubs and hitters use challenges most effectively as the season unfolds.

Umpires in Major League Baseball have overturned a called strike two after a challenge to the automated ball-strike system, known as ABS. The call was corrected on review, showing the pitch outside the strike zone. The moment is drawing attention as MLB expands use of pitch challenges, giving players a way to contest ball and strike calls during games.

A strike-one call was reversed following a challenge to the Automated Ball-Strike system, with the pitch ruled outside the zone on review. It is one of the early instances of Major League Baseball's ABS challenge system changing a call mid-at-bat, and fans are debating how often the technology should be allowed to overturn human umpires' judgment.

An umpire's strike call was overturned and ruled a ball after a challenge to Major League Baseball's Automated Ball-Strike system, marking a notable moment as the league expands the use of robot officiating to review close pitch calls.