Fernando Cruz led MLB in whiff rate in 2025 at 46.5%. The top three were Fernando Cruz, Mason Miller, Brendon Little, based on Statcast data from Baseball Savant.
Whiff rate is the percentage of swings that a pitcher generates without contact (swinging strikes divided by total swings, not total pitches). It isolates a pitcher's pure "miss-bats" ability independent of whether hitters chase out of the zone. League average hovers around 24-25%; elite swing-and-miss pitchers clear 30%, and the unicorns exceed 35%.
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Whiff rate is highly predictive of strikeout rate and tends to stabilize early in a season. Pitchers with elite whiff rates but modest strikeout totals are often called-ball-dependent arms about to break out once command catches up to their stuff.
Data source: MLB Statcast via Baseball Savant. This archive captures the 2025 season as it ended; for the live, nightly-updated leaderboard see Highest Whiff Rate in MLB.