P-Score — Starting Pitcher Strength
P-Score is PitcherStat's proprietary 0–100 starting-pitcher strength score. It evaluates a starter across a wide set of season, game-log, command, strikeout, workload and recent-form signals, then condenses that profile into one number backed by visible pillar grades.
In one paragraph
A starting pitcher is more than his ERA. P-Score is designed to capture the broader shape of the season: how effectively he prevents runs, how well he controls the strike zone, how often he misses bats, how consistently he gives his team competitive starts, how deep he works and whether the recent version of the pitcher is moving away from his season baseline. The result is a 0–100 strength score that makes different pitching profiles easier to compare without pretending they are identical.
A MULTI-LAYER PITCHING PROFILE
P-Score evaluates a broad collection of pitcher-level signals rather than leaning on one headline statistic. The exact formula is proprietary, but the model is organized around several understandable performance families. The current composite generation keeps season body-of-work primary while recent form stays inside the pillar layer rather than replacing the season read.
- Run preventionhow effectively runs and damaging contact are limited.
- Commandcontrol of walks, counts and the strike zone.
- Strikeout qualitythe ability to generate strikeouts and miss bats.
- Consistencywhether performance is repeatable from start to start rather than driven by a few extremes.
- Workloadhow much meaningful starting-pitcher volume the season contains.
- Recent formenough recency to recognize a changing pitcher without turning the score into a short-term hot-streak meter.
WHY NOT JUST ERA?
ERA answers an important question, but not every question. Two starters can own the same ERA with very different command, strikeout ability, workload and start-to-start stability. P-Score is designed to distinguish those profiles. It uses the broader body of work to show whether the headline result is supported by the rest of the pitching profile.
Illustrative example · not a real pitcher comparison
HOW TO USE IT
Use P-Score as a fast measure of season strength, then open the pitcher profile to understand the pillars behind it. On a matchup page, the difference between two P-Scores is useful context — not a prediction. Opponent quality, lineup handedness, rest, venue and current availability still belong in the game-level analysis.
QUALIFICATION
P-Score appears when a starting pitcher has accumulated enough MLB workload for the underlying profile to be treated as stable. Pitchers below that threshold can still have full PitcherStat profiles, game logs and traditional statistics without being forced into a score before the sample is ready. Current qualification threshold: 5 games started and 15 innings.
WHEN IT UPDATES
P-Score is refreshed after new completed-game data is incorporated into PitcherStat. Because it is a season-strength score, one start can move the number, but the score is intentionally more stable than a last-five-start statistic. Recompute runs on a fixed ingestion schedule so leaderboards and profiles update together.
What it does not mean
- Not a win probability.
- Not a prediction of the next start.
- Not a replacement for matchup context.
- Not a claim that two pitchers with the same score have the same strengths.
- Not a public reproduction of the proprietary formula.