PIS = (Stats_2025/26 ร 0.70)
+ (Role_Weight ร 0.20)
+ (PosWeight ร 0.10)
All inputs are normalized against absolute MLB benchmarks (e.g., 1.000 OPS, 200 IP).
Historical 2025 performance is blended with early 2026 data to provide a reliable PIS (Price Impact Score).
| Metric | Source | Weight | Rationale |
|---|
| WAR (Wins Above Replacement) | pybaseball | 0.45 | Best single holistic metric |
| TOI avg/game | MLB Stats API | 0.28 | Direct proxy for role on team |
| PP Time on Ice | MLB Stats API | 0.17 | Power play impact on totals |
| Position Weight | Roster data | 0.10 | Structural floor/ceiling by role |
| Tier | PIS Range | Typical players | Line impact |
|---|
| ๐ด CRITICAL | โฅ 0.65 | Ace SP, Elite Hitters | Major ML/Line shift |
| ๐ HIGH | 0.45โ0.64 | Mid-rotation SP, 1-4 Hitters | ML + Total move |
| ๐ก MEDIUM | 0.25โ0.44 | Platoon, Relievers | Limited volatility |
| ๐ข LOW | < 0.25 | Bench, Depth arms | Negligible |