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Mason Barnett
MLB
About Mason Barnett
Mason McLendon Barnett (born November 7, 2000) is an American professional baseball pitcher for the Athletics of Major League Baseball (MLB). He made his MLB debut in 2025.
Bio summary from Wikipedia.
Player Stats
| W | 1 | L | 4 | ERA | 7.02 | G | 20 |
|---|---|---|---|---|---|---|---|
| GS | 6 | SV | 2 | IP | 50.0 | H | 53 |
| R | 40 | ER | 39 | BB | 30 | SO | 50 |
| WHIP | 1.660 | H/9 | 9.5 | HR/9 | 2.5 | BB/9 | 5.4 |
| K/9 | 9.0 | FIP | 6.66 | WAR | -0.6 |
2026 pitching — Baseball-Reference
Career — Lahman, through 2025
Pitching
| Year | Team | W | L | ERA | G | GS | CG | SHO | SV | IP | H | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | ATH | 1 | 1 | 6.85 | 5 | 5 | 0 | 0 | 0 | 22.1 | 26 | 3 | 11 | 18 |
Season lines from the Lahman Baseball Database (Version 2025, via SABR), joined through the Chadwick Register ID crosswalk. The databank runs through the 2025 season — the current season is the 2026 line below, from the MLB Stats API.
2026 Season — MLB Stats API
Pitching
| W | L | ERA | G | GS | CG | SHO | SV | IP | H | R | ER | HR | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | 7.02 | 20 | 6 | 0 | 0 | 2 | 50.0 | 53 | 40 | 39 | 14 | 30 | 50 | 1.66 |
2026 regular-season line from the MLB Stats API (statsapi.mlb.com), pulled when this page was built. Multi-team stints are combined; rate stats are recomputed from the combined totals.
Watch Mason Barnett Highlights
“Mason Barnett 2025 MiLB Highlights!” · Open on YouTube · More Mason Barnett videos