Pitcher · 2025
José De León
- Age
- 33
- B/T
- R/R
- Height
- 6' 0"
- Weight
- 220 lb
- Number
- #78
- Born
- August 7, 1992 in Isabela, Puerto Rico
- MLB debut
- September 4, 2016
- Drafted
- 2013, round 24
- College
- Southern
- High school
- Colegio San Antonio
- dbWAR
- .1 1 season(s)
- IP
- 6.2
- ERA
- 4.05
- FIP
- 4.04
- K/9
- 10.8
- FIP−
- 97 100 = avg
José De León is a starting pitcher for the Boston Red Sox. In 2025 he struck out 8 batters over 6.2 innings across 1 appearance, 1 of them starts, going 1-0. His ERA of 4.05 was 2.6% lower than the league average of 4.16. Stripping out defence, his 4.04 FIP suggests the ERA was no fluke. He missed bats on 30.2% of swings (15.8% of every pitch he threw), walked 10.7% of the batters he faced and struck out 28.6%. His 0.1 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 | 16 | 14 | 4 | 0 | 2 | 4 | .286 | .375 | .286 | .312 | 25.0% |
| vs RHB | 12 | 11 | 4 | 1 | 1 | 4 | .364 | .417 | .636 | .449 | 33.3% |
Pitch sequencing
What José De León throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what José De León throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Four-Seam Fastball | 48 | 90.6 | 2,237 | 52.1% | 10.5% | |
| Slurve | 24 | 74.6 | 2,605 | 58.3% | 68.8% | |
| Slider | 16 | 82.4 | 2,288 | 50.0% | 0.0% | |
| Changeup | 13 | 83.5 | 1,806 | 38.5% | 33.3% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 1 | 1 | 6.2 | 1 | 0 | 0 | 8 | 3 | 8 | 3 | 4.05 | 4.04 | 1.65 | 10.8 | 4.0 | 97 | 97 | 0.1 | — |
Head to head
Put José De León 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.