Bryan Woo

Bryan Woo

26-Year-Old PitcherSP
Seattle Mariners
2026 Fantasy Outlook
In a season that much of Seattle's elite rotation was banged up, Woo stayed mostly healthy in 2025 and made a career-high 30 regular-season starts while leading the team with 186.2 innings. He did miss the final week-plus of the regular season due to a pectoral strain but returned to the mound against the Blue Jays in the ALCS. Woo's 2.94 ERA and 0.93 WHIP were nearly identical from 2024, but he improved his strikeout rate nearly six points to 27.1 percent while maintaining a 4.9 percent walk rate, which ranked fourth among qualified starting pitchers. A 3.10 xERA and 3.33 xFIP indicate he may have gotten some fortunate results at times, but his numbers were good enough that even some regression isn't a major concern. He took advantage of having pitcher-friendly T-Mobile Park as his home stadium with a 2.44 ERA, but he also pitched to a 3.40 ERA on the road. More durability was a welcome sight given Woo's health issues in the past, which combined with the improved strikeout numbers will significantly raise his fantasy profile for 2026. Read Past Outlooks
RANKS
Rest of Season From Preseason
#41
ADP
Signed a one-year contract with the Mariners in March of 2026.
Allows one hit in no-decision
PSeattle Mariners
April 4, 2026
Woo didn't factor into the decision Friday against the Angels, allowing just one hit and one walk with six strikeouts across seven shutout innings.
Analysis
The lone hit Woo allowed was an infield single to Oswald Peraza in the third inning, and Woo eventually erased him by picking Peraza off first base. While Woo dazzled across seven shutout frames, Reid Detmers nearly matched him, holding the Seattle offense to three hits and four walks across 6.2 shutout innings. The game required an extra inning after going scoreless through nine innings. Woo doesn't have any wins to show for his excellent start to the 2026 campaign, registering a 1.38 ERA and 15:2 K:BB across 13 innings. His next start is slated to come Wednesday against the Rangers.
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Pitching Stats
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2026 MLB Game Log
2026
2025
2024
2023
2026 MLB Game Log
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2025 MLB Game Log
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2024 MLB Game Log
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2023 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
85
Last 10 Games
85
Last 5 Games
85
How many pitches does Bryan Woo generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Bryan Woo generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2024
 
 
-1%
BAA vs RHP
2026
 
 
-11%
BAA vs LHP
2025
 
 
-3%
BAA vs LHP
2024
 
 
-10%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .203 648 152 33 123 24 1 20
Since 2024vs Right .200 601 162 18 115 18 0 20
2026vs Left .111 28 11 1 3 2 0 0
2026vs Right .125 18 4 1 2 0 0 0
2025vs Left .197 371 89 24 67 14 1 12
2025vs Right .203 360 109 12 70 11 0 14
2024vs Left .222 249 52 8 53 8 0 8
2024vs Right .200 223 49 5 43 7 0 6
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2024
 
 
-23%
ERA at Home
2026
 
 
-100%
ERA on Road
2025
 
 
-28%
ERA at Home
2024
 
 
-25%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2024Home 2.47 0.79 153.0 16 3 0 9.6 1.4 1.0
Since 2024Away 3.21 1.00 168.0 8 7 0 8.0 1.5 1.2
2026Home 3.00 0.83 6.0 0 0 0 13.5 1.5 0.0
2026Away 0.00 0.29 7.0 0 0 0 7.7 1.3 0.0
2025Home 2.44 0.80 88.2 10 2 0 10.2 1.6 1.2
2025Away 3.40 1.04 98.0 5 5 0 9.0 1.8 1.3
2024Home 2.47 0.77 58.1 6 1 0 8.5 0.9 0.8
2024Away 3.29 1.02 63.0 3 2 0 6.6 1.0 1.3
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Stat Review
How does Bryan Woo compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
7.50
 
K/9
10.4
 
BB/9
1.4
 
HR/9
0.0
 
Fastball
95.2 mph
 
ERA
1.38
 
WHIP
0.54
 
BABIP
.188
 
GB/FB
0.41
 
Left On Base
71.4%
 
Exit Velocity
80.1 mph
 
Barrels/BBE
0.0%
 
Spin Rate
2221 rpm
 
Balls Hit 95+ MPH
12.5%
 
Swinging Strike
13.5%
 
Prospect Rankings History
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Bryan Woo See More
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Past Fantasy Outlooks
2025
2024
Woo's 2024 season was an extension of his professional resume: impressive stints disrupted by injury. Woo required an internal brace procedure after his collegiate career in 2021, but reached the majors in 2023 and worked 131.2 innings while skipping over Triple-A in the process. The 2024 season saw him pitch nearly the same amount of innings between the majors and a minor league rehab assignment due to a mid-summer hamstring injury that preceded a forearm discomfort scare in mid-June. Woo throws five different pitches to both lefties and righties, with his sweeper being the deadliest of them all. Woo mainly used the sweeper to neutralize righties (.100 avg, 42 percent whiff rate) while using his changeup to lefties (.186 avg, 21 percent whiff rate), which helped his four-seam fastball (.218 avg, 27 percent whiff rate) play up extremely well. The pieces are here for Woo to take a step forward in 2025 like the other starters around him have recently done, but his health troubles need to get out of the way for him to fully realize his potential.
A sixth-round pick in 2021, Woo debuted in June to little fanfare. He ended up taking the ball 18 times for the Mariners around a stint on the injured list with right forearm inflammation, and Woo pitched well enough to position himself as the club's fifth starter -- at least tentatively. Woo throws the kitchen sink at opposing hitters (four-seamer, sinker, cutter, slider, changeup) and it's all helped by the extension he gets on his throws. His strikeout rate was relatively modest at 25.1%, but his minor-league K rates suggest there is room for growth in that department. He was bit by the long ball occasionally, and it's possible Seattle brings in another starter to two this winter to bump Woo down the depth chart. He's not assured of a starting role to begin 2024, but Woo will likely be needed for a good number of starts either way.
More Fantasy News
Racks up nine Ks over six frames
PSeattle Mariners
March 29, 2026
Woo allowed two runs on four hits and one walk while striking out nine batters over six innings in a no-decision against Cleveland on Saturday.
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Reaches six innings in final tuneup
PSeattle Mariners
March 23, 2026
Woo allowed one run on three hits while striking out four without a walk over six innings in Sunday's Cactus League win over the White Sox. "Extremely locked in, extremely focused, the intent he has on the mound is next to none, and it's really a big part of what he does," manager Dan Wilson said after the game regarding Woo's performance, Ryan Divish of the Seattle Times reports.
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Available in relief for Game 5
PSeattle Mariners
October 16, 2025
Woo will be available out of the bullpen Friday in Game 5 of the ALCS versus the Blue Jays, Tim Booth of The Seattle Times reports.
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Tentatively in line for Game 5
PSeattle Mariners
October 13, 2025
Woo (pectoral) is tentatively lined up to start Game 5 of the ALCS against the Blue Jays, Adam Jude of The Seattle Times reports.
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Set for bullpen session
PSeattle Mariners
October 12, 2025
Woo (pectoral) will throw a live bullpen session Monday, Shannon Drayer of SeattleSports.com reports.
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Latest Fantasy Rumors
Expected to be in ALCS roster
PSeattle Mariners
October 11, 2025
Woo is dealing with a pectoral injury but is expected to be included on the Mariners' ALCS roster, Adam Jude of The Seattle Times reports.
Analysis
Woo wasn't included on the ALDS roster, but it appears he'll be back for the ALCS. However, the right-hander likely won't be available for the first few games of the series, meaning his postseason debut will presumably come after the series moves to Seattle for Games 3 and 4.
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