Players · B · Pitcher · 2026 regular season
Matt Brash
- Age
- 28
- B/T
- R/R
- Height
- 6' 1"
- Weight
- 173 lb
- Number
- #47
- Born
- May 12, 1998 in Kingston, ON, Canada
- MLB debut
- April 12, 2022
- Drafted
- 2019, round 4
- College
- Niagara
- Salary, 2026
- $1.55M
Compare with…vs Brock Stewartvs Reid Detmersvs Daniel Palencia
- dbWAR
- 3.8 Regular season, 4 season(s)
- IP
- 16.2
- ERA
- 0.54
- FIP
- 2.92
- K/9
- 8.1
- FIP−
- 70 100 = avg
Matt Brash is a relief pitcher for the Seattle Mariners. In 2026 he struck out 15 batters over 16.2 innings across 20 appearances, going 3-0. His ERA of 0.54 was 87.1% lower than the league average of 4.18. Stripping out defence, his 2.92 FIP suggests that his ERA had some help behind him. He missed bats on 31.7% of swings (12.7% of every pitch he threw), walked 9.4% of the batters he faced and struck out 23.4%. His 0.3 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 regular season.
WAR by season
Pitching Regular season
Standard and advanced, by season. Regular-season games only — postseason games are listed separately below.
Separate from the regular season
Postseason Postseason
Wild Card through World Series. These games are counted on their own: none of them are in the regular-season tables, career totals, league context, leaderboards or dbWAR on this page.
Postseason pitching
| Season | Team | Round | G | GS | IP | W | L | SV | H | ER | HR | BB | SO | ERA | WHIP | K/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 Post | SEA | Postseason total | 8 | 0 | 9.0 | 1 | 0 | 0 | 3 | 2 | 0 | 5 | 10 | 2.00 | 0.89 | 10.0 |
| ALDS | 4 | 0 | 4.2 | 1 | 0 | 0 | 1 | 1 | 0 | 2 | 7 | 1.93 | 0.64 | 13.5 | ||
| ALCS | 4 | 0 | 4.1 | 0 | 0 | 0 | 2 | 1 | 0 | 3 | 3 | 2.08 | 1.15 | 6.2 | ||
| 2022 Post | SEA | Postseason total | 3 | 0 | 3.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0.00 | 0.00 | 10.8 |
| Wild Card | 1 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0.00 | 0.00 | 9.0 | ||
| ALDS | 2 | 0 | 2.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0.00 | 0.00 | 11.6 | ||
| Career | Postseason total · 2 Octobers | 11 | 0 | 12.1 | 1 | 0 | 0 | 3 | 2 | 0 | 5 | 14 | 1.46 | 0.65 | 10.2 |
Box-score and rate statistics only. wOBA, wRC+, FIP and dbWAR are measured against a full league season, and a postseason is a few teams playing each other for a month, so they are not computed for October.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 32 | 27 | 4 | 0 | 4 | 6 | .148 | .281 | .185 | .237 | 18.8% |
| vs RHB | 32 | 26 | 4 | 0 | 2 | 9 | .154 | .258 | .192 | .205 | 28.1% |
Pitch sequencing
What Matt Brash throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Matt Brash throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Slider | 156 | 86.8 | 2,921 | 45.5% | 38.1% | 31 | .097 | .384 | |
| Sinker | 55 | 97.4 | 2,254 | 47.3% | 19.0% | 12 | — | — | |
| Changeup | 34 | 91.0 | 1,811 | 38.2% | 27.8% | 10 | — | — | |
| Four-Seam Fastball | 15 | 96.5 | 2,226 | 26.7% | 0.0% | 1 | — | — |
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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.