| Window | G | IP | ERA | WHIP | K | BB |
|---|---|---|---|---|---|---|
| Last 7 days | 4 | 4 | 0.00 | 1.75 | 7 | 4 |
| Last 30 days | 11 | 11 | 1.59 | 1.32 | 18 | 7 |
| 2026 season | 22 | 22 | 0.79 | 0.84 | 45 | 9 |
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 | 22 | 0.79 | 0.84 | 45 | 9 | 0 |
| Home | 12 | 1.46 | 0.97 | 25 | 7 | 0 |
| Away | 10 | 0.00 | 0.68 | 20 | 2 | 0 |
Last appearance · May 19 · 22 pitches
| Pitch | Count | Usage | Avg Velo | Max |
|---|---|---|---|---|
SliderSL | 13 | 59% | 87.3 mph | 89.0 |
Four-Seam FastballFF | 9 | 41% | 101.2 mph | 101.9 |
| Date | Opp | IP | H | R | ER | BB | K | HR | ERA |
|---|---|---|---|---|---|---|---|---|---|
| 2026-05-19 | vs Los Angeles Dodgers | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0.79 |
| 2026-05-18 | vs Los Angeles Dodgers | 1 | 0 | 0 | 0 |
| 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 |
| 2024 | Oakland Athletics |
| 2 |
| 1 |
| 0 |
| 0.82 |
| 2026-05-15 | @ Seattle Mariners | 1 | 2 | 0 | 0 | 1 | 4 | 0 | 0.86 |
| 2026-05-13 | @ Milwaukee Brewers | 1 | 1 | 0 | 0 | 0 | 2 | 0 | 0.92 |
| 2026-05-09 | vs St. Louis Cardinals | 1 | 0 | 0 | 0 | 2 | 4 | 0 | 0.96 |
| 2026-05-06 | @ San Francisco Giants | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 1.04 |
| 2026-05-03 | vs Chicago White Sox | 1 | 1 | 0 | 0 | 0 | 3 | 0 | 1.10 |
| 2026-04-29 | vs Chicago Cubs | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1.17 |
| 2026-04-27 | vs Chicago Cubs | 1 | 3 | 2 | 2 | 0 | 1 | 0 | 1.26 |
| 2026-04-25 | @ Arizona Diamondbacks | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 |
| 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 | 2 teams | 1 | 2 | 60 | 61.2 | 2.63 | 0.91 | 104 | 28 | 5 | 15.18 | 4.09 |
| 2026 | San Diego Padres | 1 | 1 | 22 | 22.2 | 0.79 | 0.84 | 45 | 9 | 0 | 17.87 | 3.57 |
| Career | — | 4 | 8 | 147 | 182.2 | 2.56 | 0.94 | 291 | 74 | 13 | 14.34 | 3.65 |
