Aaron Bummer
ATL → KC · LHP · RP · Age 32
- Season
- 2026
- G/GS
- 21/0
- IP
- 16.2
- BF
- 88
- xwOBA
- .382
- K%
- 14.8%
- BB%
- 12.5%
- CSW%
- 25.9%
- Whiff%
- 19.5%
- Barrel%
- 12.7%
- FB Velo
- 90.4
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ⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sinker SI | 127 | 38.7% | 90.3 | 1998 | 0.1 | 14.3 | 11.5% | 29.1% | .402 | -3 | -2.6 |
| Sweeper ST | 71 | 21.6% | 80.6 | 2302 | 0.0 | -13.5 | 33.3% | 25.4% | .301 | -2 | -2.9 |
| Curveball CU | 70 | 21.3% | 80.2 | 2299 | -7.4 | -12.3 | 17.1% | 22.9% | .381 | -4 | -5.3 |
| Cutter FC | 33 | 10.1% | 87.7 | 2163 | 8.3 | 1.0 | 20.0% | 30.3% | .268 | 2 | 5.1 |
| 4-Seam Fastball FF | 27 | 8.2% | 90.6 | 2175 | 10.8 | 8.7 | 12.5% | 14.8% | .678 | -2 | -5.9 |
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ⓘ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | CWS | 23 | 30 | 0 | 22.0 | 91 | 18.7% | 16.5% | 2.2% | 27.8% | .329 | 93.4 |
| 2018 | CWS | 24 | 37 | 0 | 31.2 | 144 | 24.3% | 6.9% | 17.4% | 27.4% | .308 | 93.1 |
| 2019 | CWS | 25 | 58 | 0 | 67.2 | 263 | 22.8% | 9.5% | 13.3% | 27.5% | .246 | 95.6 |
| 2020 | CWS | 26 | 9 | 0 | 9.1 | 38 | 36.8% | 13.2% | 23.7% | 37.4% | .263 | 95.7 |
| 2021 | CWS | 27 | 62 | 0 | 56.1 | 242 | 31.0% | 12.0% | 19.0% | 33.1% | .249 | 95.4 |
| 2022 | CWS | 28 | 32 | 0 | 26.2 | 117 | 25.6% | 8.5% | 17.1% | 31.9% | .307 | 94.5 |
| 2023 | CWS | 29 | 61 | 0 | 58.1 | 267 | 29.2% | 13.5% | 15.7% | 35.2% | .293 | 94.4 |
| 2024 | ATL | 30 | 56 | 0 | 55.1 | 244 | 28.3% | 7.4% | 20.9% | 32.3% | .264 | 93.2 |
| 2025 | ATL | 31 | 42 | 2 | 54.1 | 236 | 21.6% | 7.6% | 14.0% | 31.0% | .318 | 91.0 |
| 2026 | KC | 32 | 21 | 0 | 16.2 | 88 | 14.8% | 12.5% | 2.3% | 25.9% | .382 | 90.4 |
| Career | — | — | 408 | 2 | 398.1 | 1730 | 25.5% | 10.2% | 15.3% | 31.1% | .287 | 94.0 |