Major League Baseball (MLB) has approved the use of robot umpires, officially called the Automated Ball/Strike System (ABS), for the 2026 season. This marks a major change in how balls and strikes will be called in the major leagues.
The ABS system uses Hawk-Eye technology with 12 cameras and a private 5G network to track pitches with high precision. The strike zone is defined as a two-dimensional plane at the midpoint of the plate, adjusting for batter height but not stance. Human umpires will still make initial calls, but players can challenge up to two calls per game by tapping their helmet or cap. Successful challenges allow teams to retain the challenge, with extra challenges granted in extra innings. Reviews will be shown on stadium videoboards to keep fans informed.
MLB’s decision follows extensive testing in minor leagues, spring training, and the 2025 All-Star Game. Commissioner Rob Manfred stated that the challenge format preserves the human element of the game while improving accuracy. The system is designed to reduce disputes and ejections caused by controversial strike calls, creating a fairer environment for players and fans.
While some traditionalists may question the role of technology, the ABS system is expected to improve consistency and fairness in pitch calls. The 2026 season will mark the beginning of this new era in MLB, blending innovation with the sport’s longstanding traditions.