A computerized system that calls balls and strikes is being tested during Major League Baseball spring training exhibition games, with a potential implementation in MLB games as early as 2026. The system uses cameras to track pitches and determine if they are within the strike zone, with a challenge system allowing teams to challenge two calls per game. The strike zone shape has been adjusted multiple times based on feedback, and the system aims to reduce errors in calling balls and strikes. MLB is also exploring different broadcast alternatives to prevent fans from influencing challenges based on the strike zone box shown on broadcasts.
Source: https://apnews.com/article/mlb-robot-umpires-abs-9034454b5a795262bf97446ff38d0361