CurveballArsenal Shape: Gloveside Drop
Δ HB -10.5in · Δ VB +0.1in
Current: HB 7.5in / VB -8.1in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / PHI
Zack Wheeler
Zack Wheeler's tools (62) outpace production (56) by 6 points. Primary finding: curveball grades as the best pitch (whiff 40.6%, csw 34.4%) but is only thrown 10.5% of the time. Also flagged: Arsenal Shape: Gloveside Drop. Most actionable fix: increase curveball usage to at least league-average for that pitch type.
Data window 2026-08-17 / 2026-08-31Confidence HIGH
Optimization map
Arsenal shape map
Hover each pitch to inspect current usage, movement shape, and whiff context beside the written diagnosis.
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ride
armside
gloveside
Movement reshape
Pitch movement dual-view
Current shape against the recommended movement window. Animation starts when this section scrolls into view.
Diagnosis
Fixable gaps
| Signal | Cause | Fix | Confidence |
|---|---|---|---|
| Arsenal Shape: Gloveside Drop0.60 | Existing Curveball is present, but its movement shape does not currently cover the desired gloveside-drop window. | Reshape existing Curveball to add gloveside drop rather than developing a new pitch from scratch.Shape refinement would improve platoon coverage while preserving the existing usage signal. | HIGH |
| Usage Underuse: Curveball0.70 | Curveball grades as the best pitch (whiff 40.6%, CSW 34.4%) but is only thrown 10.5% of the time | Increase Curveball usage to at least league-average for that pitch typeUsage rebalancing is the simplest optimization with immediate impact | HIGH |
Arsenal / metrics
Underlying components
| Component | Usage | Velo | Whiff |
|---|---|---|---|
| Four-Seam FastballFF | 41% | 95.3 | 23.4% |
| SinkerSI | 18% | 94.8 | 22.6% |
| SweeperST | 16% | 81.6 | 40.7% |
| SplitterFS | 12% | 87.9 | 18.3% |
| CurveballCU | 11% | 80.5 | 40.6% |
| CutterFC | 9% | 90.6 | 16.2% |