October Effect
Every postseason pitcher against his own regular season, with a noise band on every change.
2026 postseason: fastballs +0.5 mph against their own season; 18 of 24 pitchers throwing harder.
Through Sep 30. How this is measured
| Pitcherⓘ | Teamⓘ | Roleⓘ | Pitchesⓘ | Fastballⓘ | Veloⓘ | Spinⓘ | Rideⓘ | Runⓘ | Whiff%ⓘ |
|---|---|---|---|---|---|---|---|---|---|
| Andrew Painter | PHI | SP | 37 · 2126 | FF | 98.8 (+2.2) | +19 ±85 | -0.7 ±1.0 | -0.4 ±1.1 | +4.4 ±19.7 |
| Matt Boyd | CHC | SP | 58 · 1957 | FF | 94.5 (+1.7) | +37 ±49 | +1.0 | -0.6 ±0.8 | -2.3 ±14.3 |
| Bryan Abreu | HOU | RP | 55 · 1093 | FF | 97.4 (+1.7) | +120 | +0.1 ±0.8 | +0.3 ±0.9 | +3.7 ±19.8 |
| Didier Fuentes | ATL | RP | 33 · 1231 | FF | 98.5 (+1.2) | +82 | 0.0 ±0.8 | -0.1 ±1.1 | — |
| Jordan Hicks | CWS | RP | 38 · 888 | SI | 100.3 (+1.1) | +270 | +2.0 | +0.5 ±0.9 | — |
| Mike King | SD | SP | 97 · 2981 | SI | 94.3 (+1.1) | +92 | +0.4 ±1.0 | -0.8 ±0.8 | +16.0 |
| AJ Blubaugh | HOU | RP | 42 · 1640 | FF | 96.8 (+1.1) | +122 | +1.0 | -1.2 | — |
| Tyler Mahle | ATL | SP | 95 · 2402 | FF | 93.5 (+0.7) | +26 ±31 | -1.8 | +1.4 | +7.1 ±12.2 |
| Cam Schlittler | NYY | SP | 117 · 3041 | FF | 98.6 (+0.6) | +76 | 0.0 ±0.4 | -0.4 ±0.6 | +10.6 ±12.0 |
| Chris Sale | ATL | SP | 95 · 2574 | FF | 96.7 (+0.6 ±0.7) | -42 | -0.7 | -1.1 | +11.1 ±12.9 |
| Garrett Whitlock | BOS | RP | 35 · 743 | SI | 95.4 (+0.5) | +39 | 0.0 ±0.8 | -0.4 ±0.8 | +6.6 ±20.8 |
| Cristopher Sánchez | PHI | SP | 116 · 3158 | SI | 95.6 (+0.5) | +27 | -0.6 | -1.0 | -5.4 ±12.4 |
| Josh Hader | HOU | RP | 33 · 676 | SI | 95.5 (+0.4 ±0.4) | +104 | +0.1 ±0.7 | +0.5 ±0.8 | -10.4 ±21.3 |
| Daniel Palencia | CHC | RP | 28 · 477 | FF | 99.5 (+0.3 ±0.6) | +115 | +1.6 | -0.2 ±1.0 | — |
| Payton Tolle | BOS | SP | 83 · 2282 | FF | 96.4 (+0.3 ±0.5) | +47 | +0.2 ±0.6 | 0.0 ±0.9 | -7.9 ±12.9 |
| Sonny Gray | BOS | SP | 70 · 2474 | SI | 92.1 (+0.2 ±0.4) | -89 | -2.8 | +1.5 | +8.5 ±13.9 |
| Sean Burke | CWS | SP | 72 · 2878 | FF | 94.8 (0.0 ±0.6) | +47 | +0.9 | +0.3 ±1.0 | +12.3 ±14.5 |
| Max Fried | NYY | SP | 98 · 1696 | FC | 91.9 (0.0 ±0.7) | +71 | +0.7 ±0.9 | +0.8 ±0.8 | -6.3 ±12.9 |
| Adrián Morejón | SD | RP | 29 · 1318 | SI | 99.4 (-0.1 ±0.4) | -52 | +0.5 ±0.9 | +0.3 ±0.8 | — |
| Miguel Ullola | HOU | RP | 31 · 236 | FF | 94.6 (-0.2 ±0.4) | +61 | +1.0 | +1.6 | — |
| Jesús Luzardo | PHI | SP | 77 · 2864 | FF | 96.6 (-0.2 ±0.5) | +91 | -0.5 ±0.7 | -0.8 | +0.5 ±16.2 |
| Kevin Gausman | CHC | SP | 54 · 3003 | FF | 93.5 (-0.4 ±0.5) | +31 ±38 | +0.3 ±0.5 | -1.6 | -4.7 ±17.7 |
| Nick Pivetta | SD | SP | 66 · 578 | FF | 93.6 (-0.4) | -1 ±24 | -0.8 | -0.9 | +3.3 ±18.2 |
| Grant Taylor | CWS | RP | 54 · 1333 | FF | 97.5 (-0.6) | -7 ±55 | +0.8 ±0.8 | +0.8 ±1.0 | — |
| Josh Hendrickson | HOU | RP | 37 · 35 | FC | 87.7 (—) | — | — | — | — |
Each change is October minus his regular season. Grey changes are within their noise band, shown after ±. “—” means below a minimum or not tracked that season.