Players · S · Pitcher · 2026 regular season
Josh Simpson
- Age
- 29
- B/T
- L/L
- Height
- 6' 2"
- Weight
- 190 lb
- Number
- #37
- Born
- August 19, 1997 in Stafford, CT, United States
- MLB debut
- June 21, 2025
- Drafted
- 2019, round 32
- College
- Columbia
- dbWAR
- -.7 Regular season, 2 season(s)
- IP
- 7.1
- ERA
- 9.82
- FIP
- 9.51
- K/9
- 12.3
- FIP−
- 228 100 = avg
Josh Simpson is a relief pitcher for the Seattle Mariners. In 2026 he struck out 10 batters over 7.1 innings across 8 appearances, going 0-0. His ERA of 9.82 was 134.8% higher than the league average of 4.18. Stripping out defence, his 9.51 FIP suggests he pitched better than his ERA shows. He missed bats on 21.2% of swings (8.9% of every pitch he threw), walked 10.5% of the batters he faced and struck out 26.3%. His -0.4 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, 2026 regular season.
WAR by season
Pitching Regular season
Standard and advanced, by season. Regular-season games only.
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 | 18 | 5 | 2 | 2 | 6 | .278 | .381 | .611 | .425 | 28.6% |
| vs RHB | 17 | 15 | 6 | 2 | 2 | 4 | .400 | .471 | .867 | .555 | 23.5% |
Pitch sequencing
What Josh Simpson throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Josh Simpson throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Sinker | 59 | 92.9 | 2,197 | 50.8% | 9.1% | 12 | — | — | |
| Sweeper | 43 | 80.9 | 2,400 | 30.2% | 29.4% | 11 | — | — | |
| Curveball | 39 | 80.0 | 2,481 | 56.4% | 26.3% | 9 | — | — |
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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.