Count Calculator
Select any count to see how at-bats passing through it end — plus how umpire accuracy shifts with the count.
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Glossary: wOBA = Weighted On-Base Average (league avg ~.310; combines all offensive outcomes weighted by run value). Avg EV = average exit velocity on balls in play. False strike = called strike on pitch outside zone. Missed strike = called ball on pitch inside zone. Challenge value = counterfactual wOBA impact of a wrong call.
How this works
Outcome probabilities answer: "Given that the count reached X, what is the probability of each final at-bat outcome?" 2025 Full Season uses complete 2025 Statcast data. 2026 So Far applies the same methodology to 2026 season-to-date data, updated nightly. Umpire Accuracy shows called-pitch correctness by count.