Every grade starts with Statcast pitch tracking data — the same system that measures velocity, spin, and movement for every MLB pitch. Features are engineered to keep command, stuff, and context cleanly separated across models.
Statcast provides pitch-level tracking (velocity, spin, movement, location) for every MLB pitch since 2015. FanGraphs provides season-level context (ERA, FIP, K%, BB%) for validation and projections.
A slider to a right-handed batter is a fundamentally different pitch than a slider to a lefty. Separate models let each learn cleaner surfaces without cross-contamination from different pitch physics.
Location+ sees only location and count. Stuff+ sees only physics. This isn't a limitation — it's the design. By keeping inputs separated, each model produces a clean, interpretable signal. Pitching+ then combines everything for the full picture.
