MLB ABS Challenge Tracker

The 2026 Automated Ball-Strike challenge system, by the numbers. Who wins their challenges, which umpires get overturned, and whether any of it tracks with winning.

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Does challenge skill track with winning?

Teams

Challenges made and the share overturned in the team's favor. Sortable. Best and worst rates (min challenges) are highlighted.

Who challenges, and how well

Per team: how challenges split across batters, catchers, and pitchers (count and success rate each), and the team's most-active challenger. Sortable.

Umpires

Overturn rate = the share of challenged calls that were reversed. A high rate means more of that umpire's challenged calls were wrong. Read with care: it also reflects how selectively teams challenged that crew.

League overturn rate over time

Builds as the season accumulates. One point per snapshot day.

Players

Top challenge success (min 5 challenges).