| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 13 | 9 | 0 | 0 | 187.0 | 156 | 40 | 189 | 71 | 3.42 | 1.048 | 64.2 |
| 2026 | 5 | 5 | 0 | 0 | 82.0 | 70 | 15 | 79 | 39 | 4.28 | 1.037 | 43.9 |
| 2025 | 15 | 7 | 0 | 0 | 186.7 | 137 | 36 | 198 | 61 | 2.94 | 0.927 | 101.8 |
| 2024 | 9 | 3 | 0 | 0 | 121.3 | 96 | 13 | 101 | 39 | 2.89 | 0.898 | 62.8 |
| Date | News |
| 6/11/26 | Bryan Woo roughed up in Mariners’ loss in Baltimore. Bryan Woo’s woes on the road resurfaced Thursday night when the Orioles battered him for six runs in the third inning en route to a 7-5 victory over the Mariners. Source: https://www.seattletimes.com/sports/mariners/bryan... |
| 5/30/26 | Bryan Woo dazzles, Mariners club 4 homers to beat Diamondbacks. Bryan Woo remained unbeaten in another stellar start at home, Julio Rodríguez and Luke Raley continued to clobber baseballs, and the Mariners won their fifth straight. Source: https://www.seattletimes.com/sports/mariners/bryan... |
| 5/01/26 | Mariners’ Bryan Woo roughed up early in loss to Royals. The Royals roughed up Bryan Woo for six runs, including four in the first inning, and added another run off Seattle’s bullpen to pick up a 7-6 win over the Mariners. Source: https://www.seattletimes.com/sports/mariners/marin... |
| 4/19/26 | Mariners slug 3 homers to support Bryan Woo’s strong outing vs. Rangers. Riding another strong outing from Bryan Woo and getting homers from Rob Refsnyder, J.P. Crawford and Randy Arozarena, the Mariners secured their second series win of the season. Source: https://www.seattletimes.com/sports/mariners/marin... |
| 3/28/26 | Mariners build in downtime to keep Bryan Woo healthy for long haul. What lingers as one of the great hypothetical questions in Mariners history — what if Bryan Woo was healthy last October? — also bleeds into the team's outlook this year. Source: https://www.seattletimes.com/sports/mariners/marin... |
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