ABS system

A called strike two was overturned after a manager challenged the call under Major League Baseball's automated ball-strike system, which reviews ball and strike decisions in real time. The system, being tested this season as part of MLB's effort to improve umpiring accuracy, changed the pitch to a ball. It is among the clearest signs yet of how ABS challenges are altering games.

An umpire's call of strike one was overturned to ball one after a manager challenged it under Major League Baseball's automated ball-strike system. The review changed the pitch count without altering any score. The moment is drawing attention as MLB's ABS challenge system, being used at the top level this season, shows it can directly reverse plate umpires' calls in real games.

MLB teams and players are being ranked on their use of the automated ball-strike (ABS) challenge system in 2026. The tracker follows how often clubs contest umpire calls and how successful their challenges are, as the robot-umpire system continues its league-wide rollout. Attention is on which managers and hitters are adapting best to the new technology.

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.