CurveballArsenal Shape: Gloveside Drop
Δ HB -4.2in · Δ VB -7.9in
Current: HB 1.2in / VB -0.1in
Recommended: HB -3.0in / VB -8.0in
Optimization diagnostic / PIT
Bubba Chandler
Bubba Chandler's tools (48) outpace production (40) by 9 points. Primary finding: existing changeup is present, but its movement shape does not currently cover the desired arsenal-shape:-armside-drop window. Also flagged: Arsenal Shape: Gloveside Drop; Usage Underuse: Curveball. Most actionable fix: reshape existing changeup to add arsenal shape: armside drop rather than developing a new pitch from scratch.
Data window 2026-09-11 / 2026-09-25Confidence HIGH
Optimization map
Arsenal shape map
Hover each pitch to inspect current usage, movement shape, and whiff context beside the written diagnosis.
View arsenal in 3D →
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)0.22 | 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: Arsenal Shape: Armside Drop0.85 | Existing Changeup is present, but its movement shape does not currently cover the desired arsenal-shape:-armside-drop window. | Reshape existing Changeup to add arsenal shape: armside drop rather than developing a new pitch from scratch.Shape refinement would improve platoon coverage while preserving the existing usage signal. | HIGH |
| 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 50.0%, CSW 39.0%) but is only thrown 8.3% of the time | Increase Curveball usage to at least league-average for that pitch typeUsage rebalancing is the simplest optimization with immediate impact | MEDIUM |
| Usage Overuse: Slider0.60 | Slider grades as the weakest pitch (whiff 11.4%, CSW 25.6%) but is thrown 29.2% of the time | Reduce Slider usage in favor of higher-performing offeringsUsage rebalancing is the simplest optimization with immediate impact | MEDIUM |
Arsenal / metrics
Underlying components
| Component | Usage | Velo | Whiff |
|---|---|---|---|
| Four-Seam FastballFF | 53% | 97.1 | 22.8% |
| SliderSL | 29% | 91.7 | 11.4% |
| ChangeupCH | 11% | 89.6 | 36.2% |
| SinkerSI | 8% | 97.0 | 0.0% |
| CurveballCU | 8% | 87.3 | 50.0% |
| SweeperST | 4% | 89.6 | 0.0% |