| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 7 | 7 | 0 | 0 | 127.0 | 111 | 36 | 114 | 59 | 4.16 | 1.158 | 23.6 |
| 2026 | 2 | 0 | 0 | 0 | 27.0 | 16 | 5 | 29 | 4 | 1.33 | 0.778 | 55.4 |
| 2025 | 4 | 6 | 0 | 0 | 90.3 | 93 | 34 | 74 | 57 | 5.68 | 1.406 | -11.0 |
| 2024 | 12 | 8 | 0 | 0 | 180.3 | 131 | 45 | 171 | 59 | 2.94 | 0.976 | 89.6 |
| Date | News |
| 6/06/26 | Mariners’ Bryce Miller stumps Tigers with six shutout innings. Bryce Miller struck out nine and allowed just one hit over six shutout innings as the Mariners beat the Tigers 4-0 Saturday. Source: https://www.seattletimes.com/sports/mariners/marin... |
| 5/27/26 | [Sporting News] - Mariners piggyback plan with Bryce Miller and Luis Castillo gets interesting update. This plan for the Mariners is not going away just yet. Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 5/26/26 | [Larry Brown Sports] - Luis Castillo had a dugout eruption after getting pulled from his start against the Athletics. Seattle Mariners pitcher Luis Castillo was not a happy man when he was pulled from Monday’s game against the Athletics at Sutter Health Park in Sacramento, Calif. Castillo knew he was part of the Mariners’ piggyback plan with Bryce Miller, but he still didn’t seem to like being pulled amid a solid start against the … The post appeared first on . Source: https://sportspyder.com/mlb/oakland-athletics/arti... |
| 5/18/26 | Seattle Mariners move Luis Castillo to bullpen to piggyback Bryce Miller. Bryce Miller will make his second start of the season for the Mariners on Tuesday against the White Sox, meaning erstwhile ace Luis Castillo has been relegated to the bullpen for the first time in his career. Source: https://www.seattletimes.com/sports/mariners/seatt... |
| 5/12/26 | Bryce Miller set for season debut as Mariners begin 6-man rotation experiment. Bryce Miller will make his season debut Wednesday against the Astros, which also begins the Mariners’ experiment with a six-man starting staff. Source: https://www.seattletimes.com/sports/mariners/bryce... |
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