Who is getting better, who is slipping, and what should each player work on?

Every Pittsburgh player with pitch tracking (MLB, Triple-A Indianapolis and Bradenton in the Florida State League), checked month by month. A change makes this list only if it’s large enough to matter and clear of noise (about 3 standard errors). A 2025 → 2026 change in a rate the strike zone moves (zone rate, chase, whiffs, walks, strikeouts) is measured net of the league’s own change, because 2026’s ABS zone moved them league-wide; velocity, bat speed and exit velocity are raw changes, and Stuff and Location are graded against each season’s league. Each player then gets a short plan built from the models: what to fix, a target that beats what regression alone would deliver, and a check timed to his sample. Only Triple-A and the FSL have public tracking; High-A Greensboro, Double-A Altoona and the complex leagues don’t, so those players aren’t here.