Mark Leiter| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 4 | 6 | 2 | 17 | 54.0 | 55 | 20 | 68 | 27 | 4.47 | 1.382 | 10.7 |
| 2026 | 0 | 0 | 1 | 0 | 2.7 | 5 | 0 | 1 | 1 | 3.37 | 1.875 | 17.2 |
| 2025 | 6 | 7 | 2 | 14 | 48.3 | 57 | 17 | 54 | 26 | 4.84 | 1.531 | 10.1 |
| 2024 | 4 | 5 | 0 | 15 | 58.0 | 55 | 22 | 86 | 29 | 4.50 | 1.328 | 12.9 |
| Date | News |
| 3/31/26 | [MLB: Film Room] - Mark Leiter Jr. closes out the A's win | 03/31/2026. The Official Site of Major League Baseball Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 12/20/25 | [MLB: Athletics] - Three Minor League deals that could boost the A's big league club. Outside of signing veteran reliever Mark Leiter Jr. to a one-year deal, the Athletics have had a relatively quiet offseason when it comes to Major League transactions. The Minor League side of things, however, is a different story. Over the past couple of months, the A’s have been quietly active Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 12/13/25 | [Sports Illustrated] - One Worrisome Stat For A's Newcomer Mark Leiter Jr.. The A's latest signing, former New York Yankees reliever Mark Leiter Jr., could be a huge piece of the bullpen—or could give the game away Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 12/12/25 | Sources: A's, Leiter Jr. agree to 1-year, $3M deal. Free agent reliever Mark Leiter Jr is in agreement on a 1-year contract with the A's, sources told ESPN. Source: https://www.espn.com/mlb/story/_/id/47277875/sourc... |
| 12/12/25 | [SB Nation: Athletics Nation] - Elephant Rumblings: A’s Have Made Extension Offers To Young Core. Morning all! And happy Friday! The A’s almost came away from the annual Winter Meetings without making any moves or additions, but just snuck in a deal with right-handed reliever Mark Leiter Jr. before the end of the work week. That’s just all we know about though. The foundations for future moves and signings could […] Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
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