Kevin Gausman has a record of 3-5 with an ERA of 3.06 and 90 strikeouts in 16 appearances in the regular-season and playoffs against the Mariners in his career.
| NAME | DATE | TM | OPP | DEC | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | K. Gausman | 7/25/2014 |  BAL | @ |  SEA | 1 | 1.35 | 3 | 0 | 0 | 0 | 6.2 | 7 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 28 | 0 | |
| 2 | | K. Gausman | 8/12/2015 | BAL | @ | SEA | L | 1 | 3.86 | 8 | 0 | 0 | 0 | 7.0 | 6 | 3 | 3 | 0 | 2 | 0 | 0 | 0 | 29 | 1 |
| 3 | | K. Gausman | 7/1/2016 | BAL | @ | SEA | L | 1 | 4.50 | 7 | 0 | 0 | 0 | 6.0 | 8 | 3 | 3 | 2 | 0 | 0 | 0 | 0 | 26 | 0 |
| 4 | | K. Gausman | 8/14/2017 | BAL | @ | SEA | W | 1 | 2.57 | 6 | 0 | 0 | 0 | 7.0 | 6 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 27 | 0 |
| 5 | | K. Gausman | 6/26/2018 | BAL | vs | SEA | 1 | 1.50 | 4 | 0 | 0 | 0 | 6.0 | 5 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 23 | 0 | |
| 6 |  | K. Gausman | 9/11/2019 |  CIN | @ | SEA | 0 | 5.40 | 2 | 0 | 0 | 0 | 1.2 | 2 | 1 | 2 | 0 | 0 | 0 | 1 | 0 | 7 | 0 | |
| 7 |  | K. Gausman | 4/1/2021 |  SFG | @ | SEA | 1 | 1.35 | 6 | 0 | 0 | 0 | 6.2 | 2 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 24 | 0 | |
| 8 |  | K. Gausman | 5/18/2022 |  TOR | vs | SEA | L | 1 | 3.60 | 3 | 0 | 0 | 0 | 5.0 | 7 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 22 | 0 |
| 9 | | K. Gausman | 10/8/2022 | TOR | vs | SEA | 1 | 6.35 | 7 | 0 | 0 | 0 | 5.2 | 5 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 24 | 0 | |
| 10 | | K. Gausman | 4/29/2023 | TOR | vs | SEA | 1 | 0.00 | 13 | 0 | 0 | 0 | 7.0 | 6 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 27 | 0 | |
| 11 | | K. Gausman | 7/22/2023 | TOR | @ | SEA | 1 | 6.00 | 9 | 0 | 0 | 0 | 6.0 | 5 | 4 | 4 | 4 | 0 | 0 | 0 | 0 | 23 | 0 | |
| 12 | | K. Gausman | 7/5/2024 | TOR | @ | SEA | L | 1 | 3.00 | 10 | 0 | 0 | 0 | 6.0 | 6 | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 27 | 0 |
| 13 | | K. Gausman | 5/9/2025 | TOR | @ | SEA | W | 1 | 5.06 | 3 | 0 | 0 | 0 | 5.1 | 7 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 23 | 0 |
| 14 | | K. Gausman | 10/12/2025 | TOR | vs | SEA | L | 1 | 3.18 | 5 | 0 | 0 | 0 | 5.2 | 3 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 21 | 0 |
| 15 | | K. Gausman | 10/17/2025 | TOR | @ | SEA | 1 | 1.59 | 4 | 0 | 0 | 0 | 5.2 | 3 | 1 | 1 | 1 | 3 | 0 | 0 | 0 | 23 | 0 | |
| 16 | | K. Gausman | 10/20/2025 | TOR | vs | SEA | W | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 1 | 5 | 0 |
| Total | 14 | 3.06 | 90 | 0 | 0 | 0 | 88.1 | 78 | 30 | 31 | 11 | 21 | 0 | 1 | 1 | 359 | 1 |
Some of the information used here was obtained free of charge from Retrosheet.
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