| 2. Journée | 01.04.2018 | Seattle Sounders | - | Impact de Montréal | 0:1 | ||||
| 3. Journée | 10.05.2018 | Toronto FC | - | Seattle Sounders | 1:2 | ||||
| 3. Journée | 26.05.2018 | Seattle Sounders | - | Real Salt Lake | 0:1 | ||||
| 4. Journée | 14.06.2018 | New York RB | - | Seattle Sounders | 2:1 | ||||
| 4. Journée | 30.06.2018 | Seattle Sounders | - | Portland Timbers | 2:3 | ||||
| 5. Journée | 05.07.2018 | Colorado Rapids | - | Seattle Sounders | 1:2 | ||||
| 6. Journée | 05.08.2018 | Minnesota United FC | - | Seattle Sounders | 1:2 |  |
|||
| 6. Journée | 13.08.2018 | Seattle Sounders | - | FC Dallas | 2:1 | ||||
| 8. Journée | 18.10.2018 | Orlando City | - | Seattle Sounders | 1:2 | ||||
| 8. Journée | 21.10.2018 | Houston Dynamo | - | Seattle Sounders | 2:3 | ||||
| 8. Journée | 28.10.2018 | Seattle Sounders | - | San Jose Earthquakes | 2:1 |
Costa Rica