Mason McGwire
#35PAge 22
Bats
Right
Throws
Right
Height
6' 4"
Weight
190 lb
Born
Jan 5, 2004
Birthplace
Irvine, CA
MLB Service
—
Draft
2022 · Round 8, Pick 233 (Chicago Cubs)
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Current Contract
No multi-year contract breakdown available. Player may be pre-arbitration, a minor leaguer, or a free agent.
Minor League Pitching
Prospect — MLB debut pending. All stats below are from the minor leagues.
| Year | Lvl | Team | G | W-L | SV | IP | ERA | WHIP | K | FIP | xFIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | Rk | ACL Cubs | 11 | 1-6 | 0 | 35.1 | 9.42 | 2.18 | 36 | — | — | — |
| 2024 | A | Myrtle Beach Pelicans | 15 | 0-4 | 0 | 41.0 | 5.71 | 1.80 | 30 | — | — | — |
| 2026 | A+ | South Bend Cubs | 8 | 1-2 | 1 | 29.1 | 4.91 | 1.40 | 27 | — | — | — |
| 2026 | A+ | Tri-City Dust Devils | 5 | 1-2 | 0 | 19.2 | 4.12 | 1.47 | 23 | — | — | — |
| 2026 | A+ | — | 13 | 2-4 | 1 | 49.0 | 4.59 | 1.43 | 50 | — | — | — |
| 2026 | A | Myrtle Beach Pelicans | 10 | 2-2 | 0 | 30.0 | 2.40 | 1.07 | 45 | — | — | — |