CurveballArsenal Shape: Gloveside Drop
Δ HB -8.4in · Δ VB +0.7in
Current: HB 5.4in / VB -8.7in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / CWS
David Sandlin
David Sandlin's tools (60) outpace production (88) by -28 points. Primary finding: curveball grades as the best pitch (whiff 28.6%, csw 50.0%) but is only thrown 29.5% 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 2026-05-17 / 2026-05-31Confidence MEDIUM
Optimization map
Arsenal shape map
Hover each pitch to inspect current usage, movement shape, and whiff context beside the written diagnosis.
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 |
|---|---|---|---|
| Stuff-to-Whiff Gap (Command)0.45 | Elite stuff tunnels well but pitches land in hittable zones | Reduce heart-of-zone pitches; increase edge and chase attemptsBetter location could push whiff rate toward 24%+ | MEDIUM |
| 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 28.6%, CSW 50.0%) but is only thrown 29.5% of the time | Increase Curveball usage to at least league-average for that pitch typeUsage rebalancing is the simplest optimization with immediate impact | MEDIUM |
Arsenal / metrics
Underlying components
| Component | Usage | Velo | Whiff |
|---|---|---|---|
| 4-Seam FastballFF | 44% | 97.7 | 7.7% |
| CurveballCU | 30% | 82.9 | 28.6% |
| CutterFC | 11% | 91.8 | 20.0% |
| ChangeupCH | 7% | 92.5 | 50.0% |
| SweeperST | 5% | 86.3 | 0.0% |
| SinkerSI | 3% | 94.6 | 0.0% |