ABS (Automated Ball-Strike System)

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.

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.

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.

A strikeout call stood after a review using Major League Baseball's automated ball-strike system, with the ABS challenge confirming the pitch was a strike. The moment highlights how the new challenge mechanism is being used in games, giving players a way to contest close ball-and-strike calls that were previously final.

Major League Baseball's automated ball-strike system was used in a game for the first time in a notable moment: a called strike one was challenged and overturned to ball one. The play marks a concrete example of the ABS challenge system changing an umpire's call, a development fans and commentators are weighing as baseball experiments with technology-assisted officiating.

A strike call was upheld after a manager challenged it under Major League Baseball's automated ball-strike system, with MLB.com confirming the ruling. The ABS challenge system, now in use at the major league level, lets teams contest ball and strike decisions, and calls are verified by automated tracking rather than human judgment. The confirmed strike marks an early, high-profile moment for the new technology this season.