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Mason Barnett
P
ATH
2026 season
- GP
- 20
- W-L
- 1-4
- ERA
- 7.02
- WHIP
- 1.66
- K
- 50
- IP
- 50.0
Game log
| Date | Opp | Result | Dec | IP | H | ER | BB | K |
|---|---|---|---|---|---|---|---|---|
| Sep 24 | vs HOU | L 5-7 | - | 6.0 | 4 | 4 | 2 | 8 |
| Sep 18 | @CLE | L 3-5 | - | 3.1 | 7 | 3 | 4 | 4 |
| Aug 17 | @KC | L 5-9 | L | 2.2 | 7 | 6 | 4 | 2 |
| Aug 11 | vs TB | L 4-12 | L | 4.0 | 5 | 5 | 3 | 0 |
| Aug 6 | @CIN | L 5-6 | L | 4.1 | 5 | 5 | 3 | 7 |
| Jul 30 | vs BOS | L 4-5 | - | 5.0 | 4 | 3 | 1 | 6 |
| Jul 25 | @MIN | L 0-2 | L | 3.1 | 4 | 2 | 1 | 2 |
| Jul 10 | @CWS | L 1-14 | - | 1.0 | 3 | 3 | 1 | 0 |
| Jul 8 | @DET | L 1-6 | - | 1.0 | 0 | 0 | 2 | 0 |
| Jul 5 | vs MIA | L 8-9 | - | 2.0 | 3 | 2 | 0 | 0 |
| Jul 3 | vs MIA | L 5-12 | - | 2.0 | 3 | 4 | 2 | 2 |
| Jun 27 | @LAA | L 2-5 | - | 0.2 | 1 | 0 | 0 | 0 |
| Jun 25 | @SF | W 9-6 | S | 1.0 | 0 | 0 | 0 | 1 |
| Jun 23 | @SF | L 1-3 | - | 1.0 | 1 | 1 | 2 | 3 |
| Jun 18 | vs LAA | W 5-0 | - | 1.0 | 1 | 0 | 1 | 1 |
| Jun 15 | vs PIT | W 11-2 | - | 2.0 | 2 | 1 | 0 | 1 |
| Jun 12 | vs COL | W 6-4 | W | 1.2 | 1 | 0 | 0 | 1 |
| Jun 9 | vs MIL | W 7-5 | S | 2.0 | 0 | 0 | 0 | 4 |
| Jun 5 | @HOU | L 1-5 | - | 4.0 | 1 | 0 | 2 | 7 |
| Apr 19 | vs CWS | L 4-7 | - | 2.0 | 1 | 0 | 2 | 1 |
| 2025 season | ||||||||
| Sep 26 | vs KC | W 4-3 | - | 5.2 | 3 | 3 | 2 | 3 |
| Sep 17 | @BOS | L 4-5 | - | 4.0 | 5 | 2 | 3 | 2 |
| Sep 10 | vs BOS | W 5-4 | - | 3.2 | 7 | 3 | 1 | 4 |
| Sep 5 | @LAA | W 10-4 | W | 5.0 | 3 | 4 | 5 | 8 |
| Aug 30 | vs TEX | L 3-9 | L | 4.0 | 8 | 5 | 0 | 1 |
Latest news
Barnett allowed four runs on four hits and two walks while striking out eight over six innings in a no-decision versus the Astros on Thursday.
Barnett gave up a three-run home run to Lucas Spence and a solo shot to Isaac Paredes. The 25-year-old Barnett was most effective as a reliever this year while struggling in a starting role later in the campaign. He will likely end 2026 with a 7.02 ERA, 1.66 WHIP and 50:30 K:BB over 50 innings across 20 games (six starts). He'll have minimal fantasy appeal as long as he's calling Sutter Health Park his home field in the majors.
RotoWire via ESPN · Sep 25
Barnett will start Thursday's game against the Astros in Sacramento.
The Athletics summoned Barnett from Triple-A Las Vegas last Friday to make his first appearance for the big club in more than a month, and the 25-year-old right-hander languished in a 5-3 loss to the Guardians. He took a no-decision in the start, coughing up three runs on seven hits and four walks in 3.1 innings to bring his ERA and WHIP up to 7.16 and 1.75, respectively, over his 19 appearances for the Athletics on the season. Despite the poor showing, Barnett will receive one last turn through the rotation as the Athletics kick off a four-game set versus Houston to close out the campaign.
RotoWire via ESPN · Sep 24
Barnett did not factor into Friday's decision against Cleveland, allowing three runs on seven hits and four walks while striking out four across 3.1 innings.
Barnett was promoted from Triple-A Las Vegas ahead of Friday's start, his fifth of the season and 10th of his major-league career. He kept the Guardians off the board through the first three innings but proceeded to allow four of the first five batters he faced in the fourth on base, resulting in three runs scored for Cleveland. Barnett has allowed at least three earned runs in six of his last seven major-league outings, and he has a 7.16 ERA and 1.75 WHIP across 44 innings this season. Assuming he stays with the big club, Barnett is lined up to face the Astros at home next weekend.
RotoWire via ESPN · Sep 19
The Athletics recalled Barnett from Triple-A Las Vegas on Friday.
Barnett will start Friday's game against Cleveland, and Joe Rock has been optioned to Las Vegas in a corresponding move. Barnett has appeared in 18 games with the Athletics this season, making four starts, and owns an ugly 7.08 ERA, 1.62 WHIP and 38:24 K:BB across 40.2 innings. He's started each of his last four appearances with the club and has functioned as a starter in Triple-A, so Barnett should be stretched out.
RotoWire via ESPN · Sep 18
The Athletics will recall Barnett from Triple-A Las Vegas to start Friday's game against the Guardians, Martin Gallegos of MLB.com reports.
Barnett owns a 7.08 ERA and 1.62 WHIP through 40.2 innings in the majors this season. He hasn't fared much better in four starts since returning to the minors in mid-August (6.97 ERA, 1.84 WHIP), though he delivered a nine-inning, two-run gem for Las Vegas his last time out Saturday. He'll be welcomed back to the big leagues by a Guardians lineup that's been trending upward while posting a .748 OPS over its last 10 games.
RotoWire via ESPN · Sep 17
The Athletics optioned Barnett to Triple-A Las Vegas on Tuesday.
The transaction comes one day after Barnett was lit up for six runs over 2.2 innings in a loss to the Royals. With Jeffrey Springs (hip) slated to rejoin the Athletics' rotation this week, Barnett will lose his spot among the starting five and has now logged a 7.08 ERA, 1.62 WHIP and 38:24 K:BB over 40.2 frames in 2026.
RotoWire via ESPN · Aug 18