| Window | G | IP | ERA | WHIP | K | BB |
|---|---|---|---|---|---|---|
| Last 7 days | 2 | 2 | 0.00 | 0.43 | 4 | 0 |
| Last 30 days | 12 | 11 | 0.00 | 0.71 | 7 | 2 |
| 2026 season | 48 | 41 | 2.81 | 1.22 | 31 | 12 |
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 | 40 | 2.23 | 1.12 | 30 | 10 | 1 |
| Home | 21 | 2.49 | 1.29 | 20 | 7 | 2 |
| Away | 20 | 3.15 |
Last appearance · Jul 21 · 14 pitches
| Pitch | Count | Usage | Avg Velo | Max |
|---|---|---|---|---|
CurveballCU | 6 | 43% | 77.4 mph | 78.2 |
SinkerSI | 5 | 36% | 89.9 mph | 90.4 |
CutterFC | 2 | 14% | 85.0 mph | 85.4 |
ChangeupCH | 1 | 7% | 79.1 mph | 79.1 |
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| 2026-07-21 | vs Washington Nationals | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 2.81 |
| 2026-07-18 | vs Cincinnati Reds | 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 |
| 1.15 |
| 11 |
| 5 |
| 0 |
| 0 |
| 0 |
| 0 |
| 3 |
| 0 |
| 2.90 |
| 2026-07-12 | @ San Francisco Giants | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 2.97 |
| 2026-07-10 | @ San Francisco Giants | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 3.05 |
| 2026-07-08 | @ Los Angeles Dodgers | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3.13 |
| 2026-07-06 | @ Los Angeles Dodgers | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 3.22 |
| 2026-07-05 | vs San Francisco Giants | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 3.25 |
| 2026-07-02 | vs Miami Marlins | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 3.34 |
| 2026-07-01 | vs Miami Marlins | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 3.48 |
| 2026-06-28 | @ Minnesota Twins | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.58 |
| 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 | 3 | 3 | 48 | 41.2 | 2.81 | 1.22 | 31 | 12 | 2 | 6.70 | 2.59 |
| Career | — | 13 | 11 | 217 | 197.1 | 3.33 | 1.31 | 188 | 80 | 13 | 8.57 | 3.65 |
