DataBaseball
2026
Justin Wilson headshot

Pitcher · 2025

Justin Wilson

Age
38
B/T
L/L
Height
6' 2"
Weight
205 lb
Number
#32
Born
August 18, 1987 in Anaheim, CA, USA
MLB debut
August 20, 2012
Drafted
2008, round 5
College
Fresno State
High school
Dr. Floyd B. Buchanan
Salary, 2025
$2.25M
dbWAR
.8
2 season(s)
IP
48.1
ERA
3.35
FIP
2.95
K/9
10.6
FIP−
71
100 = avg

Justin Wilson is a relief pitcher for the Boston Red Sox. In 2025 he struck out 57 batters over 48.1 innings across 61 appearances, going 4-1. His ERA of 3.35 was 19.4% lower than the league average of 4.16 — 8th of 16 on his team, and 178th of 542 among MLB pitchers with 20+ innings. Stripping out defence, his 2.95 FIP suggests he pitched better than his ERA shows. He missed bats on 31.7% of swings (16.1% of every pitch he threw), walked 9.7% of the batters he faced and struck out 27.5%. His 0.9 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.

FIP2.95
K/910.6
WHIP1.41
WAR.9

Platoon splits

How left- and right-handed hitters fare against him.

Opponent batting by the side the hitter bats from, 2025. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB9685181925.212.292.282.26526.0%
vs RHB111983021132.306.382.439.35428.8%

Pitch sequencing

What Justin Wilson throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
Four-seamSliderCutterSplitter

Select a count to see exactly what Justin Wilson throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2025.

Four-Seam Fastball46.8%38294.52,25155.2%34.2%
Slider33.3%27288.02,29040.4%34.5%
Cutter14.8%12191.42,37046.3%17.5%
Splitter5.0%4185.11,13043.9%28.6%
Justin Wilson's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters.

Pitching

Standard and advanced, by season.

Trend
202561048.1410481857203.352.951.4110.63.781710.9
202460046.2152552951135.594.731.469.82.5137116-0.1

Head to head

Put Justin Wilson beside up to three others.

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Justin Wilson

Similar players

Nearest 2025 seasons by command, run prevention and role, on rate statistics rather than totals.

How these are computed

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.