| Window | G | IP | ERA | WHIP | K | BB |
|---|---|---|---|---|---|---|
| Last 7 days | 3 | 3 | 3.00 | 0.67 | 5 | 0 |
| Last 30 days | 12 | 10 | 3.48 | 0.97 | 10 | 1 |
| 2026 season | 72 | 62 | 2.89 | 1.16 | 48 | 15 |
How Brennan ranks vs qualified MLB pitchers in 2026. Higher percentile = better. The chip on each bar is the percentile (e.g. 11%ile means better than 11% of qualified players).
| Split | IP | ERA | WHIP | K | BB | HR |
|---|---|---|---|---|---|---|
| As starter | 1 | 20.25 | 4.50 | 1 | 2 | 1 |
| In relief | 61 | 2.51 | 1.08 | 47 | 13 | 4 |
| Home | 30 | 2.05 | 1.08 | 28 | 8 | 2 |
| Away | 31 | 3.69 |
Last appearance · Sep 19 · 19 pitches
| Pitch | Count | Usage | Avg Velo | Max |
|---|---|---|---|---|
SinkerSI | 13 | 68% | 90.6 mph | 92.9 |
CurveballCU | 4 | 21% | 77.7 mph | 77.9 |
ChangeupCH | 2 | 11% | 80.7 mph | 80.7 |
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| 2026-09-19 | vs Seattle Mariners | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 2.89 |
| 2026-09-18 | vs Seattle Mariners | 1 | 1 |
| Year | Team | W | L | G | IP | ERA | WHIP | K | BB | HR | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | Seattle Mariners | 0 | 1 | 2 | 2.1 | 3.86 | 2.14 | 0 | 2 | 0 | 0.00 | 7.71 |
| 1.23 |
| 20 |
| 7 |
| 3 |
| 1 |
| 1 |
| 0 |
| 1 |
| 0 |
| 2.93 |
| 2026-09-17 | vs San Diego Padres | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 2.83 |
| 2026-09-12 | @ Detroit Tigers | 2 | 2 | 0 | 0 | 0 | 2 | 0 | 2.88 |
| 2026-09-08 | @ New York Yankees | 0 | 3 | 3 | 3 | 1 | 0 | 1 | 2.98 |
| 2026-09-05 | vs St. Louis Cardinals | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.51 |
| 2026-09-04 | vs St. Louis Cardinals | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.54 |
| 2026-09-01 | vs Baltimore Orioles | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.56 |
| 2026-08-31 | vs Baltimore Orioles | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 2.57 |
| 2026-08-29 | @ Atlanta Braves | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2.62 |
| 2023 |
| Boston Red Sox |
| 2 |
| 1 |
| 55 |
| 50.2 |
| 3.20 |
| 1.30 |
| 58 |
| 18 |
| 4 |
| 10.30 |
| 3.20 |
| 2024 | Boston Red Sox | 4 | 3 | 57 | 51.0 | 4.06 | 1.41 | 56 | 22 | 6 | 9.88 | 3.88 |
| 2025 | Boston Red Sox | 4 | 3 | 55 | 51.2 | 3.14 | 1.26 | 43 | 26 | 1 | 7.49 | 4.53 |
| 2026 | Colorado Rockies | 4 | 3 | 72 | 62.1 | 2.89 | 1.16 | 48 | 15 | 5 | 6.93 | 2.17 |
| Career | — | 14 | 11 | 241 | 218.0 | 3.30 | 1.28 | 205 | 83 | 16 | 8.46 | 3.43 |
