Pitcher · 2025
Sean Guenther
- Age
- 30
- B/T
- L/L
- Height
- 5' 11"
- Weight
- 194 lb
- Number
- #73
- Born
- December 29, 1995 in Atlanta, GA, USA
- MLB debut
- August 4, 2021
- Drafted
- 2017, round 7
- College
- Notre Dame
- High school
- Marist School
- dbWAR
- .7 2 season(s)
- IP
- 10.1
- ERA
- 5.23
- FIP
- 3.04
- K/9
- 7.0
- FIP−
- 73 100 = avg
Sean Guenther is a relief pitcher for the Detroit Tigers. In 2025 he struck out 8 batters over 10.1 innings across 9 appearances, going 0-1. His ERA of 5.23 was 25.7% higher than the league average of 4.16. Stripping out defence, his 3.04 FIP suggests he pitched better than his ERA shows. He missed bats on 18.8% of swings (7.8% of every pitch he threw), walked 11.6% of the batters he faced and struck out 18.6%. His 0.2 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 | 21 | 19 | 7 | 0 | 2 | 4 | .368 | .429 | .474 | .399 | 19.0% |
| vs RHB | 22 | 19 | 3 | 0 | 3 | 4 | .158 | .273 | .158 | .219 | 18.2% |
Pitch sequencing
What Sean Guenther throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Sean Guenther throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Sinker | 63 | 89.9 | 2,035 | 50.8% | 12.5% | |
| Slider | 53 | 78.7 | 2,299 | 43.4% | 13.0% | |
| Splitter | 34 | 83.1 | 1,359 | 35.3% | 35.3% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 9 | 1 | 10.1 | 0 | 1 | 0 | 10 | 6 | 8 | 5 | 5.23 | 3.04 | 1.45 | 7.0 | 4.4 | 126 | 73 | 0.2 | |
| 2024 | 17 | 0 | 21.0 | 3 | 0 | 0 | 9 | 2 | 12 | 2 | 0.86 | 2.60 | 0.52 | 5.1 | 0.9 | 21 | 64 | 0.5 |
Head to head
Put Sean Guenther beside up to three others.
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.