Matt Brash

Matt Brash

26-Year-Old PitcherRP
Seattle Mariners
15-Day IL
Injury Elbow
Est. Return 5/2/2025
2025 Fantasy Outlook
If you play in only nonkeeper league formats, you do not need to read on any further. Brash had Tommy John surgery, which included installing a brace around the repaired ligament, and that surgery was completed May 10, 2024. Best-case scenario is he makes it back on the mound in Seattle by Memorial Day weekend, but these situations rarely work out in those best-case scenarios. The more likely outcome is Brash is back in the big leagues closer to the mid-summer classic and resumes his high strikeout and high walk ways while frequently showing up on Pitching Ninja clips. Pre-injury, his slider was one of the more unhittable pitches in all of baseball and he threw the pitch 51 percent of the time to hitters. Unfortunately, everything else he threw in 2023 was too hittable, as the league hit anywhere from .300 to .429 against his other offerings. Command is always the last thing to come back in these situations, and Brash did not have much to spare before his injury. He will likely be more fun to watch in social media clips than he will be to have on your roster in 2025. Read Past Outlooks
RANKS
Rest of Season
From Preseason
#383
ADP
$Signed a one-year contract with the Mariners in March of 2024.
Fares well in Cactus League outing
PSeattle Mariners
Elbow
March 24, 2025
Brash (elbow) struck out two batters and walked one in two-thirds of an inning during Monday's Cactus League game against the Padres.
ANALYSIS
Brash appeared to be amped up in what was his first live action since undergoing an internal brace procedure last May. He fired his first pitch at 98 mph and struck out the first batter he faced on three pitches. Brash then struck out the next batter he faced and walked the third, resulting in his removal after 12 pitches. According to Shannon Drayer of Seattle Times Sports, the next step for Brash will be to make sure he emerges from Monday's outing without any issues. If all goes as planned over the next day or so, he'll likely be scheduled for throwing on the back fields later in the week, followed by a rehab stint at Triple-A Tacoma.
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Pitching Stats
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2025
2024
2023
2022
2021
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Left/Right Pitching Splits
Since 2023
 
 
-26%
BAA vs RHP
2025
No Stats
2024
No Stats
2023
 
 
-26%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .281 142 36 15 34 6 1 2
Since 2023vs Right .209 166 71 14 31 3 1 1
2025vs Left 0 0 0 0 0 0 0 0
2025vs Right 0 0 0 0 0 0 0 0
2024vs Left 0 0 0 0 0 0 0 0
2024vs Right 0 0 0 0 0 0 0 0
2023vs Left .281 142 36 15 34 6 1 2
2023vs Right .209 166 71 14 31 3 1 1
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Home/Away Pitching Splits
Since 2023
 
 
-37%
ERA on Road
2025
No Stats
2024
No Stats
2023
 
 
-37%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 3.72 1.49 36.1 6 2 0 13.9 4.2 0.5
Since 2023Away 2.36 1.17 34.1 3 2 4 13.4 3.1 0.3
2025Home 0 0 0 0 0 0 0 0 0
2025Away 0 0 0 0 0 0 0 0 0
2024Home 0 0 0 0 0 0 0 0 0
2024Away 0 0 0 0 0 0 0 0 0
2023Home 3.72 1.49 36.1 6 2 0 13.9 4.2 0.5
2023Away 2.36 1.17 34.1 3 2 4 13.4 3.1 0.3
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Prospect Rankings History
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Past Fantasy Outlooks
2024
2023
2022
Brash was a workhorse for Seattle last season, establishing career-highs in games played (78) and innings (70.2). He was 2nd among qualified relievers with 107 strikeouts and 8th with a 34.7% strikeout rate and 25.3% K-BB%. The 25-year-old's 9.4% walk percentage was below-average (34th percentile), but a significant improvement over 2022's 14.9% mark. Brash's improved control was likely a big factor in him earning more high-leverage opportunities. He primarily settled into a setup role and racked up a career-best 25 holds, 9 wins and 4 saves. Brash threw far more sliders (50.5% usage) last season, a +12.7 percent difference in usage from 2022. It continues to be his most successful offering (.162 BAA, 48.5% whiff), while his secondaries could still use some work despite adding velocity on his 4-seamer (98.1 mph average). It's clear Brash is most successful as a reliever, so expect him to maintain a late-inning role for the Mariners in 2024.
Brash opened the year in the Mariners' starting rotation, but issued 17 walks and had a 2.05 WHIP through five starts and was subsequently demoted to the minors. After two months in Triple-A, he returned to Seattle as a reliever. The right-hander fared much better in this role, recording a 2.35 ERA, 1.24 WHIP and 43:16 K:BB over his final 30.2 innings. He still had one of the league's worst walk rates at 14.9%, but issued "only" 4.7 BB/9 in relief versus 7.7 BB/9 as a starter. Brash didn't find success with his 97 mph fastball (.379 BA), but his slider and curve were excellent. It's clear he has the stuff to be a shutdown reliever for the M's, but he'll need to improve his control to earn more high-leverage opportunities.
Brash had thrown just 5.1 pro innings prior to last season, which ended up being a breakout campaign. He relied primarily on a 96-mph four-seam fastball that touched 100 mph and a low-to-mid-80s slider with elite spin and movement. Brash's slider is one of the best sliders currently in pro ball. He also throws a changeup and curveball, but those lag behind as distant third and fourth offerings, respectively. It's his command and control that he really needs to improve upon to reach his potential, however, as his changeup just needs to be passable for him to have success as a starter, and he may not even need a viable third pitch given how good his top two pitches are. The 6-foot-1 righty logged an 11.9 BB% in 97.1 innings at High-A and Double-A, and he can have trouble repeating his delivery. Already on the 40-man roster, Brash will begin the regular season in the major-league rotation, ahead of guys like George Kirby and Emerson Hancock. His fastball/slider combination is enough for him to have a fallback option as a shutdown reliever if starting doesn't work out.
More Fantasy News
Poised for Cactus League debut
PSeattle Mariners
Elbow
March 24, 2025
Brash (elbow) will make his Cactus League debut Monday against the Padres, Adam Jude of The Seattle Times reports.
ANALYSIS
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Slated for live batting practice
PSeattle Mariners
Elbow
March 12, 2025
Brash (elbow) will throw a live batting practice session Wednesday, Ryan Divish of The Seattle Times reports.
ANALYSIS
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Throwing bullpen Saturday
PSeattle Mariners
Elbow
February 15, 2025
Brash (elbow) will throw a light bullpen session Saturday, Ryan Divish of The Seattle Times reports.
ANALYSIS
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Aiming for April debut
PSeattle Mariners
Elbow
February 3, 2025
Mariners president of baseball operations Jerry Dipoto said Monday that Brash (elbow) should be ready for the start of spring training and a season debut in the third week of April is the best-case scenario for the reliever, Shannon Drayer of SeattleSports.com reports.
ANALYSIS
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Aiming for late-April return
PSeattle Mariners
Elbow
November 27, 2024
The Mariners are optimistic that Brash (elbow) can make his 2025 debut by the end of April, Adam Jude of the Seattle Times reports.
ANALYSIS
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Latest Fantasy Rumors
Thriving in high-leverage role
PSeattle Mariners
August 11, 2023
Brash owns a 1.98 ERA and 1.10 WHIP across 13.2 innings since the All-Star break.
ANALYSIS
Brash is tied for the MLB lead with 14 appearances in the past 30 days. He recorded just his second save of the season August 4, but the 25-year-old has also notched 17 holds and eight wins across 57 appearances. He's a sneaky source of fantasy value with a slightly boosted ceiling after the Mariners traded closer Paul Sewald at the deadline.
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