DataBaseball
2026
Sean Hjelle headshot

Pitcher · 2025

Sean Hjelle

Age
28
B/T
R/R
Height
6' 11"
Weight
247 lb
Number
#64
Born
May 7, 1997 in Fridley, MN, USA
MLB debut
May 6, 2022
Drafted
2018, round 2
College
Kentucky
High school
Mahtomedi
dbWAR
.7
2 season(s)
IP
15.0
ERA
7.80
FIP
5.20
K/9
6.6
FIP−
125
100 = avg

Sean Hjelle is a relief pitcher for the San Francisco Giants. In 2025 he struck out 11 batters over 15.0 innings across 12 appearances, going 1-1. His ERA of 7.80 was 87.6% higher than the league average of 4.16. Stripping out defence, his 5.20 FIP suggests he pitched better than his ERA shows. He missed bats on 23.4% of swings (9.8% of every pitch he threw), walked 12.3% of the batters he faced and struck out 15.1%. 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.

FIP5.20
K/96.6
WHIP2.00
WAR-.1

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 LHB342812163.429.529.679.5048.8%
vs RHB39349138.265.316.412.31620.5%

Pitch sequencing

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

ShowBatter
SinkerKnuckle curveCutter

Select a count to see exactly what Sean Hjelle throws in it.

Pitch arsenal

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

Sinker50.0%12793.62,30744.9%8.7%
Knuckle Curve35.8%9185.82,04342.9%41.9%
Cutter14.2%3689.62,23830.6%16.7%
Sean Hjelle'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
202512115.011021131197.805.202.006.65.4188125-0.1
202458080.2340843575143.903.631.218.41.696890.8

Head to head

Put Sean Hjelle beside up to three others.

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Sean Hjelle
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.