Sean Manaea has an 8-8 record with an ERA of 3.88 and 87 strikeouts in 18 appearances 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 |  | S. Manaea | 5/4/2016 |  OAK | vs |  SEA | 1 | 7.20 | 6 | 0 | 0 | 0 | 5.0 | 7 | 4 | 4 | 1 | 1 | 0 | 0 | 0 | 24 | 1 | |
| 2 | | S. Manaea | 8/12/2016 | OAK | vs | SEA | W | 1 | 4.50 | 4 | 0 | 0 | 0 | 6.0 | 3 | 3 | 3 | 1 | 3 | 1 | 0 | 0 | 22 | 0 |
| 3 | | S. Manaea | 10/2/2016 | OAK | @ | SEA | W | 1 | 3.00 | 5 | 0 | 0 | 0 | 6.0 | 5 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 23 | 0 |
| 4 | | S. Manaea | 4/21/2017 | OAK | vs | SEA | W | 1 | 1.50 | 6 | 0 | 0 | 0 | 6.0 | 5 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 24 | 0 |
| 5 | | S. Manaea | 5/15/2017 | OAK | @ | SEA | L | 1 | 7.20 | 7 | 0 | 0 | 0 | 5.0 | 2 | 4 | 4 | 1 | 5 | 0 | 0 | 0 | 22 | 0 |
| 6 | | S. Manaea | 7/7/2017 | OAK | @ | SEA | L | 1 | 3.86 | 3 | 0 | 0 | 0 | 7.0 | 8 | 3 | 3 | 0 | 1 | 0 | 0 | 0 | 28 | 0 |
| 7 | | S. Manaea | 9/1/2017 | OAK | @ | SEA | L | 1 | 4.05 | 3 | 0 | 0 | 0 | 6.2 | 7 | 3 | 3 | 1 | 3 | 1 | 0 | 0 | 28 | 0 |
| 8 | | S. Manaea | 4/15/2018 | OAK | @ | SEA | W | 1 | 1.29 | 4 | 0 | 0 | 0 | 7.0 | 2 | 1 | 1 | 1 | 2 | 0 | 0 | 0 | 25 | 1 |
| 9 | | S. Manaea | 5/3/2018 | OAK | @ | SEA | L | 1 | 6.00 | 5 | 0 | 0 | 0 | 6.0 | 6 | 4 | 4 | 1 | 0 | 2 | 0 | 0 | 26 | 1 |
| 10 | | S. Manaea | 8/13/2018 | OAK | vs | SEA | W | 1 | 2.35 | 3 | 0 | 0 | 0 | 7.2 | 5 | 2 | 2 | 0 | 2 | 0 | 0 | 1 | 28 | 0 |
| 11 | | S. Manaea | 9/26/2019 | OAK | @ | SEA | W | 1 | 1.50 | 5 | 0 | 0 | 0 | 6.0 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 20 | 0 |
| 12 | | S. Manaea | 7/31/2020 | OAK | @ | SEA | L | 1 | 6.23 | 4 | 0 | 0 | 0 | 4.1 | 6 | 3 | 5 | 0 | 0 | 0 | 0 | 0 | 19 | 0 |
| 13 | | S. Manaea | 6/2/2021 | OAK | @ | SEA | W | 1 | 0.00 | 8 | 1 | 1 | 0 | 9.0 | 4 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 31 | 0 |
| 14 | | S. Manaea | 7/22/2021 | OAK | @ | SEA | W | 1 | 1.29 | 13 | 0 | 0 | 0 | 7.0 | 3 | 1 | 1 | 1 | 3 | 1 | 0 | 0 | 28 | 0 |
| 15 | | S. Manaea | 9/20/2021 | OAK | vs | SEA | L | 1 | 7.20 | 3 | 0 | 0 | 0 | 5.0 | 8 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 23 | 0 |
| 16 |  | S. Manaea | 7/4/2022 |  SDP | vs | SEA | L | 1 | 10.80 | 3 | 0 | 0 | 0 | 3.1 | 8 | 4 | 4 | 1 | 4 | 0 | 0 | 0 | 22 | 0 |
| 17 |  | S. Manaea | 7/4/2023 |  SFG | vs | SEA | 0 | 4.50 | 2 | 0 | 0 | 0 | 2.0 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 10 | 0 | |
| 18 |  | S. Manaea | 8/10/2024 |  NYM | @ | SEA | L | 1 | 9.00 | 3 | 0 | 0 | 0 | 3.0 | 4 | 3 | 3 | 0 | 5 | 0 | 0 | 0 | 18 | 1 |
| Total | 17 | 3.88 | 87 | 1 | 1 | 0 | 102.0 | 91 | 44 | 46 | 8 | 36 | 5 | 0 | 1 | 421 | 4 |
Some of the information used here was obtained free of charge from Retrosheet.
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