Overview

• The Automated Ball-Strike System (ABS) is being trialed in 13 spring training ballparks, allowing pitchers, catchers, and batters to challenge umpire calls on balls and strikes.
• Each team is permitted two challenges per game, which are retained if the challenge is successful, with results displayed on the stadium scoreboard within seconds.
• The system has been used in minor leagues, where it has improved strike zone accuracy and reduced disputes between players and umpires.
• Some teams, like the Rays, have embraced the system as a strategic and fan-friendly innovation, while others, like the Reds, are opting out of using it during spring training to focus on regular-season preparation.
• The ABS system is not expected to be implemented in MLB regular-season games until at least 2026, as trials continue to refine its functionality and impact on gameplay.