Players · W · Pitcher · 2026

Bryan Woo

Age: 26
B/T: R/R
Height: 6' 2"
Weight: 205 lb
Number: #22

Born: January 30, 2000 in Oakland, CA, United States
MLB debut: June 3, 2023
Drafted: 2021, round 6
College: Cal Poly

dbWAR: 10.6
IP: 173.0
ERA: 4.01
FIP: 3.25
K/9: 9.1
FIP−: 78

Bryan Woo is a starting pitcher for the Seattle Mariners. In 2026 he struck out 175 batters over 173.0 innings across 30 appearances, 30 of them starts, going 12-10. His ERA of 4.01 is 4.1% lower than the league average of 4.18 — 8th of 16 on his team, and 264th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 3.25 FIP suggests he pitched better than his ERA shows. He missed bats on 25.2% of swings (13.4% of every pitch he threw), walked 5.5% of the batters he faced and struck out 24.6%. His 3.8 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.

FIP3.25

K/99.1

WHIP1.10

WAR3.8

WAR by season

Pitching

Standard and advanced, by season.


2026	SEA	30	30	173.0	12	10	152	77	175	39	4.01	3.25	1.10	9.1	2.0	96	78	3.8
2025	SEA	30	30	186.2	15	7	137	61	198	36	2.94	3.47	0.93	9.5	1.7	71	83	3.5
2024	SEA	22	22	121.1	9	3	96	39	101	13	2.89	3.40	0.90	7.5	1.0	71	83	2.3
2023	SEA	18	18	87.2	4	5	75	41	93	31	4.21	4.36	1.21	9.5	3.2	97	101	1.0

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	402	364	86	12	30	91	.236	.301	.398	.308	22.6%
vs RHB	308	295	66	6	9	84	.224	.253	.329	.257	27.3%

Pitch sequencing

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

ShowBatter

Four-seamSinkerSliderSweeperChangeupCurveball

Select a count to see exactly what Bryan Woo throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	47.2%	1,260	96.1	2,264	51.6%	25.8%	282	.245	.715
Sinker	19.0%	508	95.9	2,267	49.2%	12.4%	143	.259	.704
Slider	13.3%	356	87.1	2,210	48.6%	32.6%	75	.253	.701
Sweeper	11.6%	309	84.5	2,477	46.0%	36.4%	90	.189	.518
Changeup	6.3%	167	89.6	1,963	40.7%	18.9%	53	.132	.296
Curveball	2.5%	67	83.0	2,290	40.3%	41.7%	17	.176	.516

Bryan Woo'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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Similar players

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

Trevor RogersBAL

ERA: 4.03
FIP: 3.45
SO: 157
WAR: 3.4

Very close

Braxton AshcraftPIT

ERA: 3.70
FIP: 3.50
SO: 173
WAR: 3.5

Very close

Michael SorokaAZ

ERA: 3.31
FIP: 3.09
SO: 110
WAR: 2.7

Very close

Paul SkenesPIT

ERA: 3.82
FIP: 3.33
SO: 200
WAR: 4.0

Very close

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.