Zack Kelly
BOS · RHP · RP · Age 31
- Season
- 2026
- G/GS
- 17/0
- IP
- 16.1
- BF
- 71
- xwOBA
- .368
- K%
- 19.7%
- BB%
- 9.9%
- CSW%
- 25.8%
- Whiff%
- 21.1%
- Barrel%
- 8.2%
- FB Velo
- 96.0
Below the qualifying minimum; percentiles rank qualified players only.
Percentile profile, 2026 regular season.
Arsenal, 2026
| Pitchⓘ | #ⓘ | Usageⓘ | Veloⓘ | Spinⓘ | IVBⓘ | HBⓘ | Whiff%ⓘ | CSW%ⓘ | xwOBAⓘ | RVⓘ | RV/100ⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cutter FC | 124 | 43.8% | 90.6 | 2476 | 7.2 | 4.0 | 21.2% | 30.6% | .462 | 2 | 1.3 |
| Sweeper ST | 62 | 21.9% | 81.6 | 2615 | 2.4 | 18.3 | 28.6% | 27.4% | .151 | 1 | 1.6 |
| Sinker SI | 48 | 17.0% | 95.9 | 2183 | 10.9 | -16.1 | 10.5% | 20.8% | .468 | 0 | -0.6 |
| 4-Seam Fastball FF | 39 | 13.8% | 96.1 | 2190 | 15.8 | -7.2 | 18.2% | 17.9% | .272 | -1 | -2.2 |
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ⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | BOS | 27 | 13 | 0 | 13.2 | 59 | 18.6% | 6.8% | 11.9% | 27.0% | .272 | 94.6 |
| 2023 | BOS | 28 | 8 | 0 | 9.1 | 43 | 14.0% | 18.6% | -4.7% | 26.5% | .358 | 94.5 |
| 2024 | BOS | 29 | 49 | 3 | 56.2 | 241 | 25.3% | 11.2% | 14.1% | 30.2% | .319 | 96.5 |
| 2025 | BOS | 30 | 28 | 0 | 35.1 | 152 | 23.0% | 7.9% | 15.1% | 28.0% | .289 | 96.1 |
| 2026 | BOS | 31 | 17 | 0 | 16.1 | 71 | 19.7% | 9.9% | 9.9% | 25.8% | .368 | 96.0 |
| Career | — | — | 115 | 3 | 131.1 | 566 | 22.4% | 10.2% | 12.2% | 28.4% | .315 | 95.9 |