Overview
- MLB debuted the ABS challenge system at the 2025 All-Star Game in Atlanta, allowing pitchers, hitters and catchers to tap their caps or helmets to request ball-strike reviews.
- Each league team received two challenges, which are retained if successful, following the same format used during spring training.
- Hawk-Eye tracking over T-Mobile’s 5G network delivers instant animated replays of pitch locations on stadium scoreboards for umpire rulings.
- Spring training trials recorded a 52.2% overturn rate on challenges and generated roughly 72% positive fan feedback with 69% favoring permanent implementation.
- MLB’s competition committee is scheduled to meet later this summer to decide on extending ABS across the regular season in 2026.