Name: Robot umpire system makes MLB debut
Uploaded: 2026-03-25T16:38:24.209Z
Duration: 2 min 48 s
Description: Major League Baseball returns Wednesday with a new system in place. For the first time, players and managers can challenge ball and strike calls using a robot umpire system known as the Automated Ball-Strike (ABS) challenge system.

Major League Baseball returns Wednesday with a new system in place. For the first time, players and managers can challenge ball and strike calls using a robot umpire system known as the Automated Ball-Strike (ABS) challenge system.

San Francisco

Major League Baseball has launched the Automated Ball Strike Challenge System (ABS) for the 2026 season, allowing players to challenge umpire decisions on balls and strikes. Each team is permitted two challenges per game, and the system uses stadium cameras to determine pitch locations, adjusting the strike zone for each player's height.

The ABS system was tested in the minor leagues since 2022, averaging four challenges per game and taking about 15 seconds per review. While 60% of minor league players prefer the challenge system over a full-time automated umpire, many still value the human element of traditional umpires. The strike zone displayed on television will now match the ABS system's zone.

Robot umpire system makes MLB debut

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Breakdown