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Mark Leiter Jr.
P
ATH
2026 season
- GP
- 36
- W-L
- 0-1
- ERA
- 4.28
- WHIP
- 1.31
- K
- 38
- IP
- 33.2
Game log
| Date | Opp | Result | Dec | IP | H | ER | BB | K |
|---|---|---|---|---|---|---|---|---|
| Jul 18 | vs WSH | W 15-1 | - | 1.0 | 1 | 0 | 1 | 2 |
| Jul 12 | @CWS | L 1-9 | - | 1.0 | 0 | 0 | 0 | 1 |
| Jul 9 | @DET | L 1-4 | - | 1.0 | 1 | 0 | 0 | 2 |
| Jul 3 | vs MIA | L 5-12 | - | 1.0 | 0 | 0 | 0 | 2 |
| Jun 16 | vs PIT | L 5-6 | - | 1.0 | 1 | 0 | 0 | 0 |
| Jun 13 | vs COL | W 7-5 | - | 1.0 | 1 | 0 | 0 | 1 |
| Jun 8 | vs MIL | L 14-15 | - | 0.1 | 1 | 1 | 2 | 1 |
| Jun 7 | @HOU | W 5-0 | - | 1.0 | 0 | 0 | 0 | 2 |
| Jun 4 | @CHC | L 6-7 | - | 1.0 | 0 | 0 | 0 | 2 |
| Jun 3 | @CHC | W 5-4 | - | 0.2 | 0 | 0 | 0 | 0 |
| May 31 | vs NYY | L 8-13 | - | 1.0 | 0 | 0 | 1 | 0 |
| May 29 | vs NYY | L 2-8 | - | 1.0 | 1 | 0 | 0 | 1 |
| May 24 | @SD | W 5-2 | - | 1.0 | 0 | 0 | 1 | 0 |
| May 21 | @LAA | W 3-2 | S | 1.0 | 1 | 0 | 0 | 1 |
| May 20 | @LAA | W 6-5 | - | 1.0 | 0 | 0 | 0 | 1 |
| May 16 | vs SF | L 4-6 | - | 2.0 | 2 | 0 | 0 | 2 |
| May 14 | vs STL | L 4-5 | - | 1.0 | 0 | 0 | 0 | 2 |
| May 12 | vs STL | L 4-6 | - | 1.0 | 0 | 0 | 0 | 1 |
| May 9 | @BAL | W 6-2 | - | 1.0 | 3 | 2 | 0 | 1 |
| May 5 | @PHI | L 1-9 | - | 0.2 | 3 | 4 | 1 | 1 |
| May 3 | vs CLE | W 7-1 | - | 1.0 | 0 | 0 | 0 | 1 |
| Apr 29 | vs KC | W 5-2 | S | 0.1 | 0 | 0 | 1 | 1 |
| Apr 28 | vs KC | L 1-4 | - | 1.0 | 0 | 0 | 0 | 1 |
| Apr 25 | @TEX | L 3-4 | - | 1.0 | 0 | 0 | 0 | 1 |
| Apr 22 | @SEA | L 4-5 | - | 1.0 | 2 | 1 | 0 | 1 |
| Apr 20 | @SEA | W 6-4 | - | 1.0 | 2 | 0 | 0 | 1 |
| Apr 18 | vs CWS | W 7-6 | - | 0.2 | 0 | 0 | 2 | 1 |
| Apr 15 | vs TEX | W 6-5 | - | 0.2 | 2 | 3 | 1 | 1 |
| Apr 14 | vs TEX | W 2-1 | S | 1.0 | 0 | 0 | 0 | 2 |
| Apr 11 | @NYM | W 11-6 | - | 1.0 | 0 | 0 | 0 | 3 |
| Apr 10 | @NYM | W 4-0 | - | 1.0 | 1 | 0 | 0 | 1 |
| Apr 7 | @NYY | L 3-5 | L | 0.2 | 5 | 4 | 0 | 0 |
| Apr 5 | vs HOU | W 12-10 | - | 1.0 | 1 | 0 | 1 | 0 |
| Mar 31 | @ATL | W 5-2 | S | 1.0 | 2 | 0 | 0 | 1 |
| Mar 30 | @ATL | L 0-4 | - | 1.0 | 1 | 0 | 0 | 0 |
| Mar 28 | @TOR | L 7-8 | - | 0.2 | 2 | 1 | 0 | 0 |
| 2025 season | ||||||||
| Sep 26 | vs BAL | W 8-4 | - | 0.2 | 0 | 0 | 2 | 1 |
| Sep 19 | @BAL | L 2-4 | - | 1.0 | 1 | 0 | 0 | 1 |
| Sep 16 | @MIN | W 10-9 | W | 1.2 | 1 | 0 | 0 | 0 |
| Sep 14 | @BOS | L 4-6 | - | 1.0 | 1 | 0 | 0 | 0 |
| Sep 10 | vs DET | L 1-11 | - | 0.1 | 2 | 1 | 0 | 1 |
| Sep 9 | vs DET | L 2-12 | - | 0.0 | 2 | 4 | 1 | 0 |
| Sep 5 | vs TOR | L 1-7 | - | 1.0 | 1 | 1 | 1 | 2 |
| Aug 28 | @CWS | W 10-4 | - | 1.0 | 0 | 0 | 0 | 1 |
| Aug 25 | vs WSH | W 10-5 | - | 0.1 | 1 | 1 | 0 | 1 |
| Aug 22 | vs BOS | L 0-1 | L | 1.0 | 2 | 1 | 0 | 0 |
| Aug 21 | vs BOS | L 3-6 | - | 0.2 | 0 | 0 | 0 | 0 |
| Aug 19 | @TB | W 13-3 | - | 1.0 | 0 | 0 | 0 | 0 |
| Aug 16 | @STL | W 12-8 | - | 0.2 | 3 | 1 | 0 | 1 |
| Aug 15 | @STL | W 4-3 | - | 0.2 | 0 | 0 | 1 | 0 |
| Aug 13 | vs MIN | L 1-4 | - | 1.0 | 1 | 0 | 0 | 0 |
| Aug 9 | vs HOU | W 5-4 | - | 0.2 | 0 | 0 | 0 | 0 |
| Aug 6 | @TEX | W 3-2 | W | 1.0 | 0 | 0 | 0 | 0 |
| Aug 5 | @TEX | L 0-2 | - | 0.1 | 0 | 0 | 0 | 0 |
| Jul 6 | @NYM | W 6-4 | - | 0.2 | 0 | 0 | 1 | 0 |
| Jul 3 | @TOR | L 5-8 | - | 1.0 | 1 | 0 | 0 | 1 |
| Jul 1 | @TOR | L 5-12 | L | 0.1 | 1 | 2 | 1 | 0 |
| Jun 30 | @TOR | L 4-5 | L | 0.1 | 3 | 2 | 0 | 1 |
| Jun 24 | @CIN | L 4-5 | L | 1.0 | 3 | 1 | 1 | 0 |
| Jun 23 | @CIN | L 1-6 | - | 1.0 | 1 | 0 | 0 | 2 |
| Jun 19 | vs LAA | W 7-3 | - | 1.0 | 0 | 0 | 0 | 0 |
| Jun 18 | vs LAA | L 2-3 | - | 0.2 | 2 | 0 | 0 | 1 |
| Jun 15 | @BOS | L 0-2 | - | 1.0 | 0 | 0 | 1 | 2 |
| Jun 12 | @KC | W 1-0 | W | 0.1 | 1 | 0 | 0 | 0 |
| Jun 11 | @KC | W 6-3 | - | 0.1 | 4 | 2 | 0 | 0 |
| Jun 7 | vs BOS | L 7-10 | - | 1.0 | 1 | 0 | 0 | 3 |
| Jun 5 | vs CLE | W 4-0 | - | 0.1 | 2 | 0 | 0 | 1 |
| Jun 3 | vs CLE | W 3-2 | - | 1.0 | 0 | 0 | 1 | 0 |
| May 31 | @LAD | L 2-18 | - | 0.2 | 4 | 4 | 0 | 0 |
| May 28 | @LAA | W 1-0 | S | 1.0 | 0 | 0 | 1 | 2 |
| May 26 | @LAA | W 5-1 | - | 0.2 | 1 | 0 | 0 | 1 |
| May 25 | @COL | W 5-4 | W | 1.1 | 0 | 0 | 1 | 2 |
| May 22 | vs TEX | W 1-0 | - | 1.0 | 2 | 0 | 0 | 2 |
| May 20 | vs TEX | W 5-2 | - | 1.1 | 0 | 0 | 0 | 2 |
| May 17 | vs NYM | L 2-3 | - | 1.0 | 1 | 0 | 0 | 0 |
| May 16 | vs NYM | W 6-2 | - | 1.0 | 1 | 0 | 0 | 1 |
| May 13 | @SEA | L 1-2 | - | 1.0 | 0 | 0 | 0 | 2 |
| May 12 | @SEA | W 11-5 | - | 1.0 | 1 | 0 | 0 | 1 |
| May 9 | @ATH | W 10-2 | - | 0.2 | 1 | 0 | 0 | 1 |
| May 3 | vs TB | L 2-3 | L | 0.1 | 2 | 2 | 1 | 1 |
| Apr 30 | @BAL | L 4-5 | - | 1.0 | 2 | 0 | 0 | 2 |
| Apr 27 | vs TOR | W 5-1 | - | 1.0 | 0 | 0 | 0 | 3 |
| Apr 25 | vs TOR | L 2-4 | - | 1.0 | 1 | 0 | 0 | 0 |
| Apr 22 | @CLE | L 2-3 | L | 0.2 | 3 | 1 | 1 | 1 |
| Apr 19 | @TB | L 8-10 | - | 1.0 | 0 | 0 | 0 | 1 |
| Apr 18 | @TB | W 1-0 | - | 1.0 | 1 | 0 | 0 | 2 |
| Apr 16 | vs KC | W 4-3 | W | 1.1 | 0 | 0 | 0 | 2 |
| Apr 13 | vs SF | L 4-5 | - | 0.2 | 1 | 0 | 0 | 1 |
| Apr 12 | vs SF | W 8-4 | - | 1.0 | 0 | 0 | 1 | 1 |
| Apr 9 | @DET | W 4-3 | S | 0.1 | 0 | 0 | 0 | 0 |
| Apr 5 | @PIT | W 10-4 | W | 1.0 | 0 | 0 | 0 | 0 |
| Apr 3 | vs AZ | W 9-7 | - | 1.0 | 1 | 0 | 0 | 2 |
| Apr 1 | vs AZ | L 5-7 | L | 0.1 | 1 | 3 | 2 | 1 |
| Mar 30 | vs MIL | W 12-3 | - | 1.0 | 0 | 0 | 0 | 2 |
| Mar 27 | vs MIL | W 4-2 | - | 1.0 | 0 | 0 | 0 | 2 |
| 2024 season | ||||||||
| Sep 29 | vs PIT | W 6-4 | - | 1.0 | 1 | 0 | 2 | 3 |
| Sep 25 | vs BAL | L 7-9 | - | 1.0 | 1 | 0 | 0 | 3 |
| Sep 24 | vs BAL | L 3-5 | - | 0.2 | 0 | 0 | 1 | 0 |
| Sep 21 | @ATH | W 10-0 | - | 2.0 | 0 | 0 | 0 | 3 |
| Sep 13 | vs BOS | W 5-4 | W | 1.1 | 3 | 2 | 0 | 2 |
Latest news
The Athletics transferred Leiter (hip) to the 60-day injured list Thursday.
Leiter has already been ruled out for the season after undergoing surgery to address a right hip impingement, so the A's will stash him away on the 60-day IL and free up a 40-man roster spot for Connor Thomas, who was claimed off waivers from Atlanta in a corresponding move.
RotoWire via ESPN · Jul 30
Leiter will undergo surgery Tuesday to address a right hip impingement and is expected to miss the remainder of the season, Martin Gallegos of MLB.com reports.
Leiter landed on the 15-day injured list Tuesday due to the injury, which he'll opt to treat with a procedure rather than rest and rehab. The 35-year-old righty will close out the season with a 4.28 ERA, 1.31 WHIP, five holds and four saves across 33.2 innings.
RotoWire via ESPN · Jul 27
The Athletics placed Leiter on the 15-day injured list Tuesday, retroactive to Sunday, with a right hip impingement.
Leiter already spent time on the injured list in late June and early July due to a right hip impingement, and he'll now end up back on the shelf after aggravating the injury. Hayden Juenger was recalled from Triple-A Las Vegas in a corresponding move to replenish the Athletics' bullpen depth.
RotoWire via ESPN · Jul 21
The Athletics reinstated Leiter (hip) from the 15-day injured list Friday.
Leiter was placed on the 15-day IL on June 18 due to a right hip impingement. He's been cleared to return to the majors without embarking on a rehab assignment and will reclaim his spot in the A's bullpen. Geoff Hartlieb was designated for assignment in a corresponding move.
RotoWire via ESPN · Jul 3
Leiter (hip) began a throwing progression Monday, MLB.com reports.
Leiter was placed on the injured list Saturday (retroactive to Thursday) due to a right hip impingement, but he didn't require much down time before resuming throwing. The Athletics are hopeful that the right-hander can return to the big-league club when first eligible July 3. In 29.2 innings this season, Leiter owns a 4.85 ERA, 1.38 WHIP and 31:10 K:BB with four saves.
RotoWire via ESPN · Jun 24
The Athletics placed Leiter on the 15-day injured list Saturday, retroactive to Thursday, due to a right hip impingement, Martin Gallegos of MLB.com reports.
Leiter has given up just one earned run in his last 14 innings, but the A's will be without his services for at least a couple of weeks while he recovers from a hip injury. Geoff Hartlieb was recalled from Triple-A Las Vegas to replenish the team's bullpen depth.
RotoWire via ESPN · Jun 20