| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 0 | 1 | 1 | 1 | 7.0 | 5 | 5 | 6 | 3 | 4.27 | 1.501 | 1.2 |
| 2025 | 0 | 1 | 0 | 0 | 5.0 | 6 | 5 | 3 | 3 | 5.40 | 2.200 | -1.5 |
| 2021 | 0 | 0 | 1 | 1 | 3.3 | 5 | 4 | 3 | 5 | 13.50 | 2.700 | -4.9 |
| 2020 | 1 | 0 | 3 | 5 | 17.3 | 4 | 8 | 19 | 1 | 0.52 | 0.692 | 50.6 |
| 2019 | 0 | 1 | 0 | 0 | 4.7 | 7 | 6 | 7 | 7 | 13.50 | 2.786 | -7.7 |
| 2017 | 3 | 6 | 0 | 0 | 69.7 | 78 | 27 | 55 | 41 | 5.30 | 1.507 | -5.1 |
| 2016 | 2 | 4 | 0 | 0 | 46.3 | 57 | 19 | 23 | 31 | 6.02 | 1.640 | -10.8 |
| 2015 | 6 | 6 | 0 | 0 | 96.7 | 88 | 25 | 64 | 36 | 3.35 | 1.169 | 30.2 |
| 2014 | 7 | 4 | 0 | 0 | 73.3 | 57 | 32 | 70 | 25 | 3.07 | 1.214 | 29.3 |
| Date | News |
| 5/21/25 | Seattle Mariners Promote Veteran Hurler to Active Roster to Strengthen Bullpen. The Seattle Mariners made one roster move on Wednesday before the series finale against the Chicago White Sox, promoting veteran right-hander Jesse Hahn to the active roster. In a corresponding move, 37-year-old Casey Lawrence was designated for assignment, as has become customary after he pitches. Lawrence threw five solid innings for the M's on Tuesday, but suffered the loss as Seattle lost 1-0 at Rate Field. Source: https://www.si.com/mlb/mariners/news/seattle-marin... |
| 4/05/25 | New Mariners reliever Jesse Hahn gets long-awaited call back to MLB. He wasn’t sure he’d ever get this chance again, but Mariners reliever Jesse Hahn was back on a big-league roster for the first time in four years Saturday. Source: https://www.seattletimes.com/sports/mariners/new-m... |
| 5/20/21 | Royals Return Jesse Hahn From Rehab Assignment, Reinstate Him From Injured List. The Kansas City Royals announced on Thursday they have returned right-handed pitcher Jesse Hahn from his rehab assignment and reinstated him from the injured list. The team will make a corresponding move prior to tomorrow's game against the Detroit Tigers in Kansas City. Hahn spent some time on the 10-day injured list with right shoulder impingement syndrome. Source: https://www.si.com/mlb/royals/news/royals-return-j... |
| 4/12/21 | Jesse Hahn lands on Injured List. The Royals placed reliever Jesse Hahn on the 10-day Injured List today with right shoulder impingement syndrome, according to Alec Lewis of The Athletic. Right-hander Jake Newberry was promoted to replace him on the roster. Hahn was nearly unhittable in 17 1/3 innings in 2020, allowing just four hits, and none against left-handers. Source: https://www.royalsreview.com/2021/4/12/22380187/je... |