MLB's new tech lets players challenge umpire's ball-and-strike calls in real time
Major League Baseball will introduce a major change to the game this week. Starting Wednesday, teams can challenge the home plate umpire's ball-and-strike calls for the first time. The new Automated Ball-Strike (A.B.S.) Challenge System will let players question decisions using advanced technology.
The system relies on a network of high-tech cameras installed in every MLB stadium. These cameras track the baseball's precise path and check whether the umpire's call was correct. If a player disagrees with a ball or strike decision, they can signal for a review by tapping their head.
Only three people on the field—the pitcher, catcher, or batter—can request a challenge. They must act immediately and cannot consult coaches or teammates before doing so. Once a challenge is made, a graphic will appear on the outfield screen, showing whether the pitch was truly a ball or a strike.
Each team begins the game with two challenges. If a challenge succeeds, the team keeps that opportunity. But if they fail twice, they lose the ability to challenge further calls for the rest of the game.
No official data has yet been released on how the system might affect umpires' decisions since its rollout.
The A.B.S. Challenge System marks a significant shift in how MLB games are officiated. Players now have a way to contest ball-and-strike calls in real time, using technology to verify accuracy. The impact of this change will become clearer as teams begin using the system in live games.
