Players · P · Pitcher · 2026 regular season

Jack Perkins

Age: 27
B/T: R/R
Height: 6' 1"
Weight: 220 lb
Number: #50

Born: December 26, 1999 in Kokomo, IN, United States
MLB debut: June 22, 2025
Drafted: 2022, round 5
College: Indiana
High school: Kokomo

Compare with…vs Griffin Canning vs Jake Irvin vs Alan Rangel

dbWAR: 1.0
IP: 121.0
ERA: 6.10
FIP: 4.77
K/9: 10.4
FIP−: 114

Jack Perkins is a relief pitcher for the Athletics. In 2026 he struck out 140 batters over 121.0 innings across 37 appearances, going 3-13. His ERA of 6.10 was 45.9% higher than the league average of 4.18 — 14th of 18 on his team, and 494th of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 4.77 FIP suggests he pitched better than his ERA shows. He missed bats on 27.3% of swings (13.1% of every pitch he threw), walked 9.4% of the batters he faced and struck out 25.9%. His 0.6 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, 2026 regular season.

FIP4.77

K/910.4

WHIP1.45

WAR.6

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only.

																				Trend
2026	ATH	37	17	121.0	3	13	3	125	82	140	51	6.10	4.77	1.45	10.4	3.8	146	114	0.6
2025	ATH	12	4	38.2	3	2	3	27	18	37	18	4.19	4.12	1.16	8.6	4.2	101	99	0.4

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	294	257	68	12	31	84	.265	.352	.451	.353	28.6%
vs RHB	247	219	57	11	20	56	.260	.336	.475	.354	22.7%

Pitch sequencing

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

ShowBatter

Four-seamSweeperChangeupCutterSinkerSliderUnknown

Select a count to see exactly what Jack Perkins throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Four-Seam Fastball	28.9%	607	95.7	2,237	48.3%	16.8%	127	.291	1.011
Sweeper	27.5%	578	86.3	2,774	54.8%	38.0%	137	.226	.698
Changeup	18.6%	390	89.5	1,185	42.1%	37.5%	103	.204	.483
Cutter	15.0%	315	92.6	2,456	47.3%	18.6%	61	.393	1.031
Sinker	5.4%	114	94.8	2,263	39.5%	17.5%	29	.310	1.084
Slider	3.0%	62	86.0	2,774	43.5%	29.6%	15	.133	.435
Unknown	1.7%	35	—	—	51.4%	21.4%	4	—	—

Jack Perkins'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. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

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Similar players

Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.

Griffin CanningSD

ERA: 5.68
FIP: 4.75
SO: 87
WAR: 0.1

Jake IrvinWSH

ERA: 5.48
FIP: 5.08
SO: 110
WAR: 0.3

Alan RangelPHI

ERA: 5.88
FIP: 4.60
SO: 29
WAR: 0.1

Cristian JavierHOU

ERA: 5.14
FIP: 4.72
SO: 59
WAR: 0.2

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.