As it seeks a solution somewhere between full-on robot umpires and human umpires calling balls and strikes, MLB is experimenting with one such compromise—an Automated Ball-Strike challenge system—during spring training games in 2025.
The Automated Ball-Strike system, or ABS system, which was tested at the Triple-A level during the 2023 and '24 seasons, is slated to be featured in roughly 60% of games this spring. As clubs begin training for game action with live batting practice sessions, the ABS system is being previewed for hitters and pitchers.
