| Date | Match | Score | |
|---|---|---|---|
| L | 2025-10-05 | Seattle Sounders v Portland Timbers | 1–0 |
| D | 2025-05-18 | Portland Timbers v Seattle Sounders | 1–1 |
| D | 2024-10-20 | Seattle Sounders v Portland Timbers | 1–1 |
| W | 2024-09-01 | Portland Timbers v Seattle Sounders | 1–0 |
| L | 2024-05-12 | Portland Timbers v Seattle Sounders | 1–2 |
| D | 2023-09-03 | Seattle Sounders v Portland Timbers | 2–2 |
| D | 2023-06-03 | Seattle Sounders v Portland Timbers | 0–0 |
| W | 2023-04-16 | Portland Timbers v Seattle Sounders | 4–1 |
| W | 2022-08-27 | Portland Timbers v Seattle Sounders | 2–1 |
| W | 2022-07-09 | Seattle Sounders v Portland Timbers | 0–3 |
| W | 2021-08-30 | Seattle Sounders v Portland Timbers | 0–2 |
| L | 2021-08-16 | Portland Timbers v Seattle Sounders | 2–6 |
| L | 2021-05-09 | Portland Timbers v Seattle Sounders | 1–2 |
| D | 2020-10-23 | Seattle Sounders v Portland Timbers | 1–1 |
| W | 2020-09-24 | Portland Timbers v Seattle Sounders | 1–0 |
| W | 2020-09-07 | Seattle Sounders v Portland Timbers | 1–2 |
| L | 2020-08-24 | Portland Timbers v Seattle Sounders | 0–3 |
| L | 2019-08-24 | Portland Timbers v Seattle Sounders | 1–2 |
| W | 2019-07-22 | Seattle Sounders v Portland Timbers | 1–2 |
| L | 2018-11-09 | Seattle Sounders v Portland Timbers | 2–1 |
| W | 2018-11-04 | Portland Timbers v Seattle Sounders | 2–1 |
| L | 2018-08-27 | Portland Timbers v Seattle Sounders | 0–1 |
| W | 2018-06-30 | Seattle Sounders v Portland Timbers | 2–3 |
| W | 2018-05-13 | Portland Timbers v Seattle Sounders | 1–0 |
| D | 2017-08-28 | Seattle Sounders v Portland Timbers | 1–1 |
League meetings on record only — domestic cup and European ties are not yet in the archive, so this is the league ledger of the rivalry, not every match ever played. Results from PitchVAR's own football warehouse.