| Window | G | IP | ERA | WHIP | K | BB |
|---|---|---|---|---|---|---|
| Last 7 days | 3 | 3 | 5.40 | 1.20 | 0 | 1 |
| Last 30 days | 10 | 9 | 7.00 | 1.44 | 5 | 2 |
| 2026 season | 21 | 18 | 3.93 | 1.25 | 13 | 5 |
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 | 17 | 2.65 | 1.00 | 12 | 3 | 0 |
| Home | 8 | 3.12 | 1.27 | 8 | 3 | 1 |
| Away | 9 | 4.66 | 1.24 | 5 |
Last appearance · May 18 · 18 pitches
| Pitch | Count | Usage | Avg Velo | Max |
|---|---|---|---|---|
CurveballCU | 5 | 28% | 78.0 mph | 78.5 |
SinkerSI | 4 | 22% | 89.9 mph | 91.4 |
CutterFC | 4 | 22% | 86.9 mph | 87.8 |
ChangeupCH | 3 | 17% | 80.6 mph | 81.9 |
Four-Seam FastballFF | 2 | 11% | 87.7 mph | 88.0 |
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| 2026-05-18 | vs Texas Rangers | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 3.93 |
| 2026-05-14 | @ Pittsburgh Pirates | 1 | 2 | 2 | 2 |
| 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 |
| 2023 | Boston Red Sox |
| 2 |
| 0 |
| 0 |
| 0 |
| 0 |
| 4.15 |
| 2026-05-13 | @ Pittsburgh Pirates | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 3.38 |
| 2026-05-08 | @ Philadelphia Phillies | 0 | 2 | 3 | 3 | 1 | 1 | 0 | 3.60 |
| 2026-05-07 | vs New York Mets | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.84 |
| 2026-05-04 | vs New York Mets | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.88 |
| 2026-05-02 | vs Atlanta Braves | 0 | 3 | 2 | 2 | 0 | 1 | 1 | 2.03 |
| 2026-04-29 | @ Cincinnati Reds | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0.71 |
| 2026-04-23 | vs San Diego Padres | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.82 |
| 2026-04-21 | vs San Diego Padres | 1 | 2 | 0 | 0 | 0 | 2 | 0 | 0.87 |
| 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 | 2 | 1 | 21 | 18.1 | 3.93 | 1.25 | 13 | 5 | 1 | 6.38 | 2.45 |
| Career | — | 12 | 9 | 190 | 174.0 | 3.52 | 1.33 | 170 | 73 | 12 | 8.79 | 3.78 |
