Pitcher · 2025
Luis Guerrero
- Age
- 25
- B/T
- R/R
- Height
- 6' 0"
- Weight
- 215 lb
- Born
- August 5, 2000 in Bani, Dominican Republic
- MLB debut
- September 8, 2024
- Drafted
- 2021, round 17
- College
- Chipola JC
- High school
- Home Schooled
- dbWAR
- .3 2 season(s)
- IP
- 17.1
- ERA
- 4.15
- FIP
- 4.40
- K/9
- 5.2
- FIP−
- 106 100 = avg
Luis Guerrero is a relief pitcher for the Boston Red Sox. In 2025 he struck out 10 batters over 17.1 innings across 13 appearances, going 0-1. His ERA of 4.15 was level with the league average of 4.16. Stripping out defence, his 4.40 FIP suggests the ERA was no fluke. He missed bats on 29.5% of swings (13.1% of every pitch he threw), walked 19.4% of the batters he faced and struck out 13.9%. His 0.0 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 | 29 | 22 | 6 | 0 | 6 | 2 | .273 | .414 | .364 | .358 | 6.9% |
| vs RHB | 43 | 35 | 3 | 0 | 8 | 8 | .086 | .256 | .114 | .205 | 18.6% |
Pitch sequencing
What Luis Guerrero throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Luis Guerrero throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2025.
| Slider | 124 | 84.6 | 2,344 | 39.5% | 35.1% | |
| Four-Seam Fastball | 108 | 96.5 | 2,187 | 39.8% | 24.4% | |
| Sweeper | 43 | 82.0 | 2,430 | 46.5% | 30.0% | |
| Changeup | 14 | 87.7 | 1,855 | 42.9% | 18.2% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 13 | 0 | 17.1 | 0 | 1 | 0 | 9 | 8 | 10 | 14 | 4.15 | 4.40 | 1.33 | 5.2 | 7.3 | 100 | 106 | 0.0 | |
| 2024 | 9 | 0 | 10.0 | 0 | 0 | 0 | 6 | 0 | 9 | 2 | 0.00 | 1.97 | 0.80 | 8.1 | 1.8 | 0 | 48 | 0.3 |
Head to head
Put Luis Guerrero 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.