Pitcher · 2025
Jesse Hahn
- Age
- 36
- B/T
- R/R
- Height
- 6' 5"
- Weight
- 205 lb
- Number
- #37
- Born
- July 30, 1989 in Norwich, CT, USA
- MLB debut
- June 3, 2014
- Drafted
- 2010, round 6
- College
- Virginia Tech
- High school
- Robert E. Fitch
- dbWAR
- -.2 1 season(s)
- IP
- 5.0
- ERA
- 5.40
- FIP
- 8.14
- K/9
- 5.4
- FIP−
- 196 100 = avg
Jesse Hahn is a relief pitcher for the Seattle Mariners. In 2025 he struck out 3 batters over 5.0 innings across 3 appearances, going 0-1. His ERA of 5.40 was 29.9% higher than the league average of 4.16. Stripping out defence, his 8.14 FIP suggests that his ERA had some help behind him. He missed bats on 25.8% of swings (10.1% of every pitch he threw), walked 20.0% of the batters he faced and struck out 12.0%. 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 | 7 | 5 | 3 | 0 | 2 | 1 | .600 | .714 | .600 | .563 | 14.3% |
| vs RHB | 18 | 13 | 3 | 1 | 3 | 2 | .231 | .412 | .462 | .349 | 11.1% |
Pitch sequencing
What Jesse Hahn throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jesse Hahn throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Sinker | 43 | 94.9 | 2,334 | 32.6% | 5.0% | |
| Sweeper | 17 | 81.9 | 3,084 | 35.3% | 66.7% | |
| Curveball | 11 | 79.2 | 3,126 | 36.4% | 33.3% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 3 | 0 | 5.0 | 0 | 1 | 0 | 6 | 3 | 3 | 5 | 5.40 | 8.14 | 2.20 | 5.4 | 9.0 | 130 | 196 | -0.2 | — |
Head to head
Put Jesse Hahn 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.