Knuckle CurveArsenal Shape: Gloveside Drop
Δ HB -12.0in · Δ VB -2.0in
Current: HB 9.0in / VB -6.0in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / PHI
Aaron Nola
Aaron Nola's production (42) outpaces the tools grade (32) by 10 points. Primary finding: existing knuckle curve is present, but its movement shape does not currently cover the desired gloveside-drop window.
Data window 2026-09-12 / 2026-09-26Confidence MEDIUM
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 Knuckle Curve is present, but its movement shape does not currently cover the desired gloveside-drop window. | Reshape existing Knuckle Curve 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 |
Arsenal / metrics
Underlying components
| Component | Usage | Velo | Whiff |
|---|---|---|---|
| Knuckle CurveKC | 35% | 78.6 | 37.1% |
| Four-Seam FastballFF | 31% | 92.0 | 17.1% |
| ChangeupCH | 16% | 85.1 | 9.5% |
| SinkerSI | 15% | 91.2 | 0.0% |
| CutterFC | 6% | 85.7 | 0.0% |