Overview

• The Joint Competition Committee approved league-wide use of ABS starting in 2026 across spring training, the regular season and the postseason.
• Each team gets two challenges per game, initiated only by the pitcher, catcher or batter with an immediate helmet tap, with successful challenges retained and an extra-inning provision if none remain.
• ABS uses 12 Hawk-Eye cameras over a T-Mobile 5G private network, with a two-dimensional strike zone 17 inches wide and height-adjusted at 53.5% (top) and 27% (bottom), and rulings displayed on videoboards in roughly 15 seconds.
• MLB testing showed about 4.1 challenges per game in spring training, a 52.2% overturn rate, average review times around 13–15 seconds, and catchers leading success rates at 56%.
• The 11-member committee (six owners, four players, one umpire) passed the measure after collaboration with the umpires’ union; MLB cited player preference for challenges, while the MLBPA noted players’ votes were not unanimous.