CurveballArsenal Shape: Gloveside Drop
Δ HB -12.9in · Δ VB +1.5in
Current: HB 9.9in / VB -9.5in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / BAL
Chris Bassitt
Chris Bassitt's production (65) outpaces the tools grade (36) by 29 points. Primary finding: existing curveball is present, but its movement shape does not currently cover the desired gloveside-drop window.
Data window 2026-08-17 / 2026-08-31Confidence 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 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 |
Arsenal / metrics
Underlying components
| Component | Usage | Velo | Whiff |
|---|---|---|---|
| SinkerSI | 41% | 92.7 | 13.0% |
| CurveballCU | 20% | 71.4 | 28.5% |
| CutterFC | 15% | 90.5 | 31.0% |
| Four-Seam FastballFF | 15% | 92.5 | 9.9% |
| SweeperST | 9% | 74.0 | 37.3% |
| ChangeupCH | 6% | 85.7 | 0.0% |
| SliderSL | 6% | 81.3 | 28.3% |