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Player

Zack Kelly

BOSPBats RThrows RActive

Season 2025 · as of 2025-09-28.

Pitches

587

CSW%

25.9%

Whiff%

19.5%

Avg velo

90.1 mph

Usage
Share of pitches by type.
Velocity
Average release speed by game date.
Movement
Average Savant pfx_x / pfx_z (inches).
Release
Average release side and height (feet).
Pitch types
Compact rates for the filtered window.
PitchPitchesUsageVeloSpinCSW%Whiff%
Cutter18231.0%91.8 mph2,406 rpm29.7%18.2%
Sweeper12020.4%81.8 mph2,668 rpm26.7%25.5%
Four-seam Fastball11519.6%96.1 mph2,148 rpm27.8%21.0%
Sinker8915.2%96.1 mph2,152 rpm21.3%9.5%
Changeup6911.8%83.1 mph2,086 rpm18.8%24.0%
Curveball61.0%82.3 mph2,526 rpm33.3%25.0%
Unknown50.9%0.0%
Pitchout10.2%97.1 mph2,200 rpm0.0%
Split path
Mean trajectories from release to the plate. Tunnel paths are season-long; date, count, and inning filters stay on the charts above.
Tunnel Score
Pairwise release, decision-point, and plate separation. Open a row to plot that pair.
PairTunnel ScoreRelease sepDecision sepPlate sepPair N
Four-seam Fastball / Sinker0.6080.10 ft0.44 ft0.83 ft89
Changeup / Sweeper0.5910.39 ft0.30 ft1.00 ft69
Cutter / Sinker0.4390.12 ft0.82 ft0.73 ft89
Cutter / Four-seam Fastball0.4180.20 ft0.84 ft0.74 ft115
Changeup / Cutter0.3160.36 ft1.94 ft1.06 ft69
Changeup / Four-seam Fastball0.2960.36 ft2.76 ft1.32 ft69
Four-seam Fastball / Sweeper0.2700.36 ft3.04 ft1.26 ft115
Sinker / Sweeper0.2190.26 ft3.01 ft0.92 ft89
Cutter / Sweeper0.1800.18 ft2.22 ft0.53 ft120
Changeup / Sinker0.1350.36 ft2.73 ft0.48 ft69