CurveballArsenal Shape: Gloveside Drop
Δ HB -11.8in · Δ VB +3.2in
Current: HB 8.8in / VB -11.2in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / HOU
Mike Burrows
Mike Burrows's tools (39) outpace production (72) by -33 points. Primary finding: slider grades as the best pitch (whiff 45.1%, csw 48.9%) but is only thrown 7.0% of the time. Also flagged: Arsenal Shape: Gloveside Drop. Most actionable fix: increase slider 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 |
|---|---|---|---|
| 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: Slider0.70 | Slider grades as the best pitch (whiff 45.1%, CSW 48.9%) but is only thrown 7.0% of the time | Increase Slider 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 |
|---|---|---|---|
| Four-Seam FastballFF | 37% | 94.6 | 10.5% |
| ChangeupCH | 33% | 86.4 | 20.2% |
| CurveballCU | 17% | 78.6 | 0.0% |
| SinkerSI | 10% | 94.6 | 8.1% |
| SliderSL | 7% | 89.8 | 45.1% |