Pitcher · 2025
Spencer Schwellenbach
- Age
- 25
- B/T
- R/R
- Height
- 6' 1"
- Weight
- 200 lb
- Number
- #56
- Born
- May 31, 2000 in Saginaw, MI, USA
- MLB debut
- May 29, 2024
- Drafted
- 2018, round 34
- College
- Nebraska
- High school
- Saginaw Heritage
- dbWAR
- 4.6 2 season(s)
- IP
- 110.2
- ERA
- 3.09
- FIP
- 3.25
- K/9
- 8.8
- FIP−
- 78 100 = avg
Spencer Schwellenbach is a starting pitcher for the Atlanta Braves. In 2025 he struck out 108 batters over 110.2 innings across 17 appearances, 17 of them starts, going 7-4. His ERA of 3.09 was 25.7% lower than the league average of 4.16 — 4th of 17 on his team, and 138th of 542 among MLB pitchers with 20+ innings. Stripping out defence, his 3.25 FIP suggests the ERA was no fluke. He missed bats on 28.3% of swings (14.7% of every pitch he threw), walked 4.1% of the batters he faced and struck out 24.9%. His 2.2 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2025.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 236 | 218 | 49 | 11 | 14 | 46 | .225 | .272 | .413 | .294 | 19.5% |
| vs RHB | 198 | 192 | 40 | 2 | 4 | 62 | .208 | .227 | .313 | .234 | 31.3% |
Pitch sequencing
What Spencer Schwellenbach throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Spencer Schwellenbach throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Four-Seam Fastball | 555 | 97.1 | 2,318 | 56.2% | 27.1% | |
| Slider | 285 | 87.0 | 2,349 | 42.5% | 34.4% | |
| Splitter | 218 | 84.7 | 1,368 | 41.7% | 42.0% | |
| Curveball | 180 | 81.0 | 2,301 | 50.6% | 31.1% | |
| Cutter | 177 | 94.1 | 2,301 | 50.8% | 17.7% | |
| Sinker | 158 | 95.6 | 2,179 | 44.3% | 11.1% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17 | 17 | 110.2 | 7 | 4 | 0 | 89 | 38 | 108 | 18 | 3.09 | 3.25 | 0.97 | 8.8 | 1.5 | 74 | 78 | 2.2 | |
| 2024 | 21 | 21 | 123.2 | 8 | 7 | 0 | 106 | 46 | 127 | 23 | 3.35 | 3.29 | 1.04 | 9.2 | 1.7 | 82 | 81 | 2.4 |
Head to head
Put Spencer Schwellenbach beside up to three others.
Similar players
Nearest 2025 seasons by command, run prevention and role, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.