Mason Barnett
Pitcher · Career Stats, Bio & Records (2025-2026)
Mason Barnett is a pitcher who has played in Major League Baseball since 2025 for the Athletics, a span of 2 seasons. Across 25 career appearances, he has gone 2-5 with a 6.97 ERA and 68 strikeouts.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
- Position
- Pitcher
- Bats / Throws
- R / R
- Height / Weight
- 6'0" / 218 lb
- MLB Debut
- 2025-08-30
- Jersey
- #63
Full name: Mason McLendon Barnett
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | ATH | AL | 1 | 1 | 5 | 5 | 0 | 0 | 0 | 22.1 | 26 | 17 | 11 | 18 | 6.85 | 4.16 (-65%) | -403.6 |
| 2026 | ATH | AL | 1 | 4 | 20 | 6 | 0 | 0 | 2 | 50.0 | 53 | 39 | 30 | 50 | 7.02 | 4.18 (-68%) | - |
| Career · 2 seasons | 2 | 5 | 25 | 11 | 0 | 0 | 2 | 72.1 | 79 | 56 | 41 | 68 | 6.97 | — | -404 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | ATH | AL | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 1 season | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
View full game log (10 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 3 | 0 | 0 | 0 | 0 | 0 | — |
| Away | 2 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 3 | 13.1 | 18 | 11 | 3 | 8 | 7.42 |
| Away | 2 | 9.0 | 8 | 6 | 8 | 10 | 6.00 |
Last 5 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-09-26 | OAK | KCR | — | 5.2 | 3 | 3 | 3 | 2 | 3 | 1 |
| 2025-09-17 | OAK | BOS | — | 4.0 | 5 | 3 | 2 | 3 | 2 | 1 |
| 2025-09-10 | OAK | BOS | — | 3.2 | 7 | 3 | 3 | 1 | 4 | 0 |
| 2025-09-05 | OAK | LAA | W | 5.0 | 3 | 4 | 4 | 5 | 8 | 0 |
| 2025-08-30 | OAK | TEX | L | 4.0 | 8 | 5 | 5 | 0 | 1 | 1 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 5 |
Mason Barnett: the record in brief
Active since a debut on August 30, 2025, Mason Barnett has a record on this page that is still being added to. The team column never changes: it is the Athletics in 2025. Born on November 7, 2000, in Kennesaw, GA, USA, Barnett is listed as a pitcher and threw and hit right-handed. Barnett's listed size is 6 feet, 0 inches and 218 pounds. Mason Barnett was the playing name; the full given name is Mason McLendon.
The pitching table credits Barnett with a 2-5 record and a 6.97 ERA in 25 games. Also on Barnett's record: 68 strikeouts. Against a 4.17 league ERA for the same seasons, the 6.97 mark was 67.2% worse. The strikeout high was 50 in 2026. Among the heaviest workloads, the lowest ERA was 7.02 in 2026, when the league's was 4.18.
The game-log section draws on 10 games of Retrosheet box scores for Barnett.
Every defensive appearance on record for Barnett, 5 games, came at pitcher.
Frequently Asked Questions about Mason Barnett
- What years did Mason Barnett play?
- Mason Barnett played in Major League Baseball from 2025 to 2026.
- Was Mason Barnett a pitcher?
- Yes. Mason Barnett pitched in the major leagues, recording 2 wins and 68 strikeouts.
- What teams has Mason Barnett played for?
- Mason Barnett has played for 2 teams: the Athletics (2025) and the Athletics (2026).
- What are Mason Barnett's career stats?
- In 25 games, Mason Barnett has gone 2-5 with a 6.97 ERA, 68 strikeouts, 72.1 innings pitched, and 2 saves.
- What position does Mason Barnett play?
- Mason Barnett plays primarily as a pitcher, the position where he has appeared in the most games.
- How tall is Mason Barnett and how much does he weigh?
- Mason Barnett is listed at 6 feet and 218 pounds.
- What number does Mason Barnett wear?
- Mason Barnett wears number 63, according to MLB's 2026 roster data.
- What was Mason Barnett's career ERA?
- Mason Barnett finished with a 6.97 career ERA, going 2-5 with 68 strikeouts.
- How many strikeouts did Mason Barnett have?
- Mason Barnett recorded 68 career strikeouts.