Riley O'Brien
STL · RHP · RP · Age 31
- Season
- 2026
- G/GS
- 66/0
- IP
- 64.0
- BF
- 276
- xwOBA
- .340
- K%
- 23.2%
- BB%
- 10.5%
- CSW%
- 29.5%
- Whiff%
- 26.8%
- Barrel%
- 7.5%
- FB Velo
- 97.7
Percentile profile, 2026 regular season.
Arsenal, 2026
| Pitchⓘ | #ⓘ | Usageⓘ | Veloⓘ | Spinⓘ | IVBⓘ | HBⓘ | Whiff%ⓘ | CSW%ⓘ | xwOBAⓘ | RVⓘ | RV/100ⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sinker SI | 620 | 58.3% | 97.7 | 2197 | 4.7 | -16.1 | 16.7% | 29.8% | .373 | 1 | 0.2 |
| Sweeper ST | 349 | 32.8% | 82.9 | 2318 | -4.4 | 14.6 | 47.2% | 30.1% | .255 | 1 | 0.3 |
| Slider SL | 82 | 7.7% | 90.6 | 2445 | 3.7 | 2.2 | 21.4% | 24.4% | .359 | 2 | 2.0 |
Pitch types with 25+ pitches; knuckle curves and slow curves shown as curveballs. Grey rates: under 405 pitches of the type (Savant’s qualifying line, 2.5 per team game).
Season by season
| Seasonⓘ | Teamⓘ | Ageⓘ | Gⓘ | GSⓘ | IPⓘ | BFⓘ | K%ⓘ | BB%ⓘ | K−BB%ⓘ | CSW%ⓘ | xwOBAⓘ | FB Veloⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | CIN | 26 | 1 | 1 | 1.1 | 9 | 22.2% | 33.3% | -11.1% | 26.2% | .624 | — |
| 2022 | SEA | 27 | 1 | 0 | 1.0 | 5 | 20.0% | 20.0% | 0.0% | 21.7% | .240 | — |
| 2024 | STL | 29 | 8 | 0 | 8.0 | 46 | 23.9% | 17.4% | 6.5% | 26.8% | .383 | 96.8 |
| 2025 | STL | 30 | 42 | 0 | 48.0 | 199 | 22.6% | 11.1% | 11.6% | 28.0% | .296 | 98.0 |
| 2026 | STL | 31 | 66 | 0 | 64.0 | 276 | 23.2% | 10.5% | 12.7% | 29.5% | .340 | 97.7 |
| Career | — | — | 118 | 1 | 122.1 | 535 | 23.0% | 11.8% | 11.2% | 28.5% | .331 | 97.7 |