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Player

William Kempner

MIAPBats RThrows RActive

2026 pitcher indexes. Scores are 0–100. Confidence is sample stability, not performance. Shape, Command, Deception, and Execution are a research decomposition — not a single Stuff+ badge. Decision / Contact / Damage split the swing process. Click a score for the stored breakdown. Not a pick or wager.

Shape / Command / Deception / Execution
Four-way pitch quality from stored components. Execution weights those three; it is not a betting grade.
Pitch Shape by type
Stored type distinctiveness versus the league. Score 61.
Command parts
Location, ahead-count CSW, and edge share. Score 33.
Release spread
Stored release RMS in feet from daily means. Lower is tighter. Score 61.
Season percentiles
Share of scored players this season with a lower value.
  • Pitch Shape6198 pctl
  • Command3399 pctl
  • Mechanical Consistency6176 pctl
  • Pitch Predictability2658 pctl
  • Pitcher Adaptability1079 pctl
Next-pitch concentration
How concentrated the next pitch is given the last pitch. Higher bars mean a more concentrated follow-up mix after that pitch.
Mix change by context
How much pitch mix changes by count, leverage, TTO, and runners. Total-variation distance from the overall mix.