| Window | G | IP | ERA | WHIP | K | BB |
|---|---|---|---|---|---|---|
| Last 7 days | 2 | 2 | 3.38 | 0.38 | 4 | 0 |
| Last 30 days | 11 | 12 | 2.84 | 1.03 | 24 | 4 |
| 2026 season | 63 | 67 | 1.21 | 0.84 | 123 | 23 |
How Mason 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 |
|---|---|---|---|---|---|---|
| In relief | 67 | 1.21 | 0.84 | 123 | 23 | 3 |
| Home | 40 | 1.34 | 0.77 | 75 | 15 | 2 |
| Away | 26 | 1.01 | 0.94 | 48 | 8 | 1 |
Last appearance · Sep 20 · 7 pitches
| Pitch | Count | Usage | Avg Velo | Max |
|---|---|---|---|---|
Four-Seam FastballFF | 4 | 57% | 100.3 mph | 100.8 |
SliderSL | 3 | 43% | 87.9 mph | 88.8 |
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| 2026-09-20 | vs Miami Marlins | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1.21 |
| 2026-09-19 | vs Miami Marlins | 1 | 1 |
| Year | Team | W | L | G | IP | ERA | WHIP | K | BB | HR | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | Oakland Athletics | 0 | 3 | 10 | 33.1 | 3.78 | 1.20 | 38 | 16 | 2 | 10.26 | 4.32 |
| 1 |
| 1 |
| 0 |
| 4 |
| 1 |
| 1.23 |
| 2026-09-14 | @ Colorado Rockies | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 1.12 |
| 2026-09-12 | @ San Francisco Giants | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 1.14 |
| 2026-09-11 | @ San Francisco Giants | 1 | 1 | 0 | 0 | 2 | 2 | 0 | 1.16 |
| 2026-09-07 | vs Washington Nationals | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 1.17 |
| 2026-09-06 | vs New York Yankees | 1 | 0 | 0 | 0 | 1 | 3 | 0 | 1.19 |
| 2026-09-04 | vs New York Yankees | 2 | 1 | 1 | 0 | 0 | 4 | 0 | 1.21 |
| 2026-08-30 | @ Tampa Bay Rays | 1 | 2 | 2 | 2 | 0 | 2 | 1 | 1.26 |
| 2026-08-25 | vs Pittsburgh Pirates | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0.96 |
| 2024 |
| Oakland Athletics |
| 2 |
| 2 |
| 55 |
| 65.0 |
| 2.49 |
| 0.88 |
| 104 |
| 21 |
| 6 |
| 14.40 |
| 2.91 |
| 2025 | Athletics | 1 | 2 | 38 | 38.1 | 3.76 | 1.02 | 59 | 18 | 4 | 13.85 | 4.23 |
| 2025 | San Diego Padres | 0 | 0 | 22 | 23.1 | 0.77 | 0.73 | 45 | 10 | 1 | 17.36 | 3.86 |
| 2025 | 1 | 2 | 60 | 61.2 | 2.63 | 0.91 | 104 | 28 | 5 | 15.18 | 4.09 |
| 2026 | San Diego Padres | 5 | 2 | 63 | 67.0 | 1.21 | 0.84 | 123 | 23 | 3 | 16.52 | 3.09 |
| Career | — | 8 | 9 | 188 | 227.0 | 2.34 | 0.92 | 369 | 88 | 16 | 14.63 | 3.49 |
