Players · J · Pitcher · 2026

Hayden Juenger

Age: 26
B/T: R/R
Height: 6' 0"
Weight: 180 lb
Number: #58

Born: August 9, 2000 in O’Fallon, IL, United States
MLB debut: May 31, 2026
Drafted: 2021, round 6
College: Missouri State

dbWAR: .2
IP: 16.0
ERA: 9.00
FIP: 4.04
K/9: 3.4
FIP−: 97

Hayden Juenger is a relief pitcher for the Athletics. In 2026 he struck out 6 batters over 16.0 innings across 15 appearances, going 0-1. His ERA of 9.00 is 115.4% higher than the league average of 4.18. Stripping out defence, his 4.04 FIP suggests he pitched better than his ERA shows. He missed bats on 14.8% of swings (6.8% of every pitch he threw), walked 9.9% of the batters he faced and struck out 7.4%. His 0.2 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.

FIP4.04

K/93.4

WHIP2.00

WAR.2

Pitching

Standard and advanced, by season.

																				Trend
2026	ATH/TOR	15	0	16.0	0	1	0	24	16	6	8	9.00	4.04	2.00	3.4	4.5	215	97	0.2	—

Platoon splits

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

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	32	26	10	0	5	2	.385	.469	.462	.415	6.3%
vs RHB	49	41	14	0	3	4	.341	.383	.488	.375	8.2%

Pitch sequencing

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

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Four-seamSliderChangeupCutter

Select a count to see exactly what Hayden Juenger throws in it.

Pitch arsenal

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


Four-Seam Fastball	34.9%	102	94.6	2,356	45.1%	14.9%	18	.389	.978
Slider	24.3%	71	88.1	2,358	43.7%	11.1%	18	.444	1.011
Changeup	21.2%	62	88.5	2,321	30.6%	24.1%	20	.250	.586
Cutter	19.5%	57	91.3	2,364	33.3%	8.7%	11	—	—

Hayden Juenger'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.

Head to head

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Hayden Juenger

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.