DataBaseball
2026
Jack O'Loughlin headshot

Pitcher · 2024

Jack O'Loughlin

Age
24
B/T
L/L
Height
6' 5"
Weight
223 lb
Number
#37
Born
March 14, 2000 in Adelaide, SA, Australia
MLB debut
May 26, 2024
Salary, 2024
$740,000
dbWAR
-.0
1 season(s)
IP
9.2
ERA
4.66
FIP
4.82
K/9
5.6
FIP−
118
100 = avg

Jack O'Loughlin is a relief pitcher for the Oakland Athletics. In 2024 he struck out 6 batters over 9.2 innings across 4 appearances, going 0-0. His ERA of 4.66 was 14.1% higher than the league average of 4.08. Stripping out defence, his 4.82 FIP suggests the ERA was no fluke. He missed bats on 20.5% of swings (9.7% of every pitch he threw), walked 10.6% of the batters he faced and struck out 12.8%. 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, 2024.

FIP4.82
K/95.6
WHIP1.86
WAR-.0

Platoon splits

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

Opponent batting by the side the hitter bats from, 2024. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHB15145013.357.400.357.34320.0%
vs RHB32288143.286.375.464.3699.4%

Pitch sequencing

What Jack O'Loughlin throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter
Four-seamSliderCurveballChangeup

Select a count to see exactly what Jack O'Loughlin throws in it.

Pitch arsenal

What he throws, how hard, and how often it misses in 2024.

Four-Seam Fastball52.3%9291.82,22143.5%6.4%
Slider21.6%3882.82,39439.5%38.9%
Curveball15.9%2876.02,42139.3%50.0%
Changeup9.7%1784.01,52635.3%33.3%
Jack O'Loughlin'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
2024409.2000135654.664.821.865.64.7114118-0.0

Head to head

Put Jack O'Loughlin beside up to three others.

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Jack O'Loughlin
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.