| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 8 | 8 | 0 | 0 | 135.0 | 124 | 54 | 139 | 66 | 4.40 | 1.319 | 19.5 |
| 2025 | 7 | 7 | 0 | 0 | 92.7 | 81 | 37 | 113 | 42 | 4.08 | 1.273 | 26.7 |
| 2024 | 0 | 0 | 0 | 0 | 10.3 | 5 | 7 | 8 | 6 | 5.23 | 1.161 | -0.7 |
| 2023 | 1 | 0 | 1 | 0 | 12.3 | 14 | 2 | 8 | 6 | 4.38 | 1.297 | 3.0 |
| Date | News |
| 1/13/26 | [Locked On A's] - Jacob Lopez Is Bigger Than You Think. Jacob Lopez didn’t need hype or velocity to earn his spot. His 2025 season quietly changed expectations, and 2026 could be the year he locks himself into the... Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 1/13/26 | [Locked On A's] - JACOB'S LADDER. Jacob Lopez didn’t come into 2025 with hype, headlines, or prospect-list shine — and by the end of the season, none of that mattered. In this episode of Lock... Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 1/03/26 | [MLB: Film Room] - Top Rookies of 2025: Jacob Lopez | 01/04/2026. Jacob Lopez ranks 24th on MLB Network's Top Rookies of 2025 list after striking out 113 batters Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 12/15/25 | [SB Nation: Athletics Nation] - 2025 Season in Review: Jacob Lopez. Next up in our look back at the A’s players in 2025, we turn back to the rotation and look at the year with Jacob Lopez. Will 2026 be his year to break permanently into the starting rotation? How was he acquired? Jacob Lopez was originally drafted by the San Francisco Giants in the 26th […] Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 8/26/25 | A's Calling Up Former Kansas City Royals Prospect For MLB Debut. Following the diagnosis of a Grade 1 flexor strain for Jacob Lopez on Monday, the A's officially placed the left-hander on the IL on Tuesday. Taking his place on the roster will be former Kansas City Royals prospect Mason Barnett, whom the Athletics acquired at the 2024 MLB Trade Deadline as part of the return for Lucas Erceg. Barnett is ranked as the A's No. 11 prospect by MLB.com. Barnett had not been on the A's 40-man roster before the move, but to make room for Zack Gelof on the roster yesterday, they decided to designate Luis Urías for assignment, which left them with 39 players on the 40-man roster, essentially clearing up a spot for Barnett. Source: https://www.si.com/mlb/athletics/prospects/a-s-cal... |
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