The Dodgers have struggled with MLB’s new automated strike zone system, successfully challenging only 5 of 21 calls this spring.

The Dodgers have struggled with MLB’s new Automated Ball-Strike Challenge System this spring, successfully challenging only 5 of 21 calls—among the lowest rates in baseball. Manager Dave Roberts called it a learning curve as players adapt to the Hawk-Eye-powered system, which uses player-specific strike zones based on height. Each team gets two challenges per game, with extra ones in extra innings. Players with minor league ABS experience, like Dalton Rushing and Landon Knack, are adjusting, but many still challenge borderline pitches. Catchers typically make most challenges, and teams are learning to save them for key moments. The system, set to debut in the regular season, displays challenged calls instantly and counts any pitch touching the zone’s edge as a strike.