Bryan Woo

Active

Seattle Mariners · Pitcher

Age 266' 2" · 205 lbsThrows Right

FBaseball Overview

Coming off an All-Star season and All-MLB Second Team selection in 2025, Woo anchors Seattle's rotation as a reliable strikeout source with legitimate Cy Young upside moving forward. His 2026 campaign shows some regression from his stellar 2.94 ERA and 0.93 WHIP, settling into a 4.26 ERA with 92 strikeouts over 93 innings—suggesting injury or reduced workload may have limited his availability. In standard rotisserie and points leagues, he remains a solid mid-tier starter who can contribute wins and strikeouts, though fantasy managers should monitor his health and innings pitched given the significant drop-off from his breakthrough 2025. The 26-year-old's young arm and demonstrated excellence against major league hitters provide optimism for a bounce-back, making him a calculated risk for patient owners seeking upside in deeper formats.

MLB Pitching

Year	Team	G	GS	W	L	ERA	WHIP	K	IP	BB
2023	Seattle Mariners	18	18	4	5	4.21	1.21	93	87.2	31
2024	Seattle Mariners	22	22	9	3	2.89	0.90	101	121.1	13
2025	Seattle Mariners	30	30	15	7	2.94	0.93	198	186.2	36
2026	Seattle Mariners	17	17	7	6	4.17	1.03	97	99.1	19
Career	Totals	87	87	35	21	3.40	0.99	489	494.3	99

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Minor League Pitching

Year	Team	G	GS	W	L	ERA	WHIP	K	IP	BB
2022	3 teams▼	16	16	1	4	4.11	1.32	84	56.3	22
2023	Arkansas Travelers	9	9	3	2	2.05	0.89	59	44.0	12
2024	2 teams▼	4	4	0	0	1.29	0.57	19	14	2
Career	Totals	29	29	4	6	2.97	1.06	162	115	36

Source: MLB Stats API · Multi-team seasons show combined totals — click to expand

Game Log2026 season

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Analytics2026 season · via Baseball Savant

Click for year to year changes

FB Velo95.7 mph

Avg Spin2283 rpm

Whiff %24.6%

K %24.3%

BB %4.8%

Hard Hit %43.4%

Barrel %6.8%

xERA3.34

xBA Against0.235

xSLG Against0.38

BA Against0.222

SLG Against0.340

GB%37.1%

FB%31.4%

What These Stats Mean

FB Velo — Average fastball velocity. Harder throwers generate more swings and misses, setting up every other pitch in their arsenal. Velocity is the foundation of strikeout upside.

Avg Spin — Average spin rate across all pitches. Higher spin creates more movement and makes pitches harder to square up — elite spinners run better strikeout and batting average against numbers.

Whiff % — Swings-and-misses per swing. The most direct measure of a pitcher's ability to miss bats and the best leading indicator of strikeout rate.

K % — Strikeout rate per batter faced. The core fantasy pitching stat — high K% means reliable strikeout totals that hold up even in shorter starts.

BB % — Walk rate per batter faced. The primary control metric. High BB% tanks ERA and WHIP and keeps baserunners on constantly. Elite starters typically run below 7%.

Hard Hit % — Percentage of batted balls hit 95 mph or harder against. Low hard-hit% means weak contact, protecting both ERA and the defense behind the pitcher.

Barrel % — Percentage of batted balls barreled against. The most direct home run predictor — low barrel% pitchers rarely give up long balls.

xERA — Expected ERA based on contact quality allowed, removing the effect of sequencing, luck, and defense. Better predictor of future ERA than ERA itself.

xBA Against — Expected batting average opponents should hit based on contact quality. A gap between xBA and actual BA indicates unsustainable luck in either direction.

xSLG Against — Expected slugging allowed based on contact quality. High xSLG against predicts future extra-base damage; low xSLG means the pitcher is genuinely suppressing power.

BA Against — Actual batting average opponents are hitting — a key WHIP component. Check xBA to see if the number is sustainable.

SLG Against — Actual slugging allowed. Captures hits, doubles, triples, and home runs — lower means the pitcher is limiting the power damage he gives up.

GB% — Ground ball rate. High GB% pitchers generate double plays, limit home runs, and keep the ball in the park — great for protecting ERA and WHIP ratios.

FB% — Fly ball rate. High FB% pitchers give up more air contact — dangerous when combined with high exit velocity, less so when contact is soft.

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Year

Team

ERA

WHIP

2023

Seattle Mariners

4.21

1.21

87.2

2024

Seattle Mariners

2.89

0.90

101

121.1

2025

Seattle Mariners

2.94

0.93

198

186.2

2026

Seattle Mariners

4.17

1.03

99.1

Career

Totals

3.40

0.99

489

494.3

Year

Team

ERA

WHIP

2022

3 teams▼

4.11

1.32

56.3

2023

Arkansas Travelers

2.05

0.89

44.0

2024

2 teams▼

1.29

0.57

Career

Totals

2.97

1.06

162

115