4APP Plyo Balls
The 4APP Plyo Ball System is a 7-piece velocity training set engineered for elite pitchers and competitive arm development. Featuring a gapless overload-to-underload weight spectrum, a humidity-resistant engineered shell, and a revolutionary half-seam dual-feel design, this system provides unmatched biomechanical grip and authentic pitch feel across all training environments.
- Humidity-Resistant Grip: Features a proprietary composite shell texture that maintains a clean, consistent hold in sweat and high heat, eliminating dangerous over-gripping.
- Dual Feel Half-Seam Architecture: Engineered with one side featuring realistic raised seams for pitch shapes, and a completely smooth side for constraint-based mechanical training.
- Cohesive Weight Spectrum: A complete 7-piece progression covering 3.5 oz up to 4 lbs, completely eliminating weight gaps for smooth biomechanical scaling.
- Optimized Rebound Control: Dialed-in wall thickness guarantees durable, controlled rebound profiles off hard facility surfaces to prevent unpredictable ricochets.
Original: $99.99
-65%$99.99
$35.00










Description
The 4APP Plyo Ball System is a 7-piece velocity training set engineered for elite pitchers and competitive arm development. Featuring a gapless overload-to-underload weight spectrum, a humidity-resistant engineered shell, and a revolutionary half-seam dual-feel design, this system provides unmatched biomechanical grip and authentic pitch feel across all training environments.
- Humidity-Resistant Grip: Features a proprietary composite shell texture that maintains a clean, consistent hold in sweat and high heat, eliminating dangerous over-gripping.
- Dual Feel Half-Seam Architecture: Engineered with one side featuring realistic raised seams for pitch shapes, and a completely smooth side for constraint-based mechanical training.
- Cohesive Weight Spectrum: A complete 7-piece progression covering 3.5 oz up to 4 lbs, completely eliminating weight gaps for smooth biomechanical scaling.
- Optimized Rebound Control: Dialed-in wall thickness guarantees durable, controlled rebound profiles off hard facility surfaces to prevent unpredictable ricochets.




