| 7. Journée | 02.09.2018 | New England Revolution | - | Portland Timbers | 1:1 |  |
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| 7. Journée | 09.09.2018 | Portland Timbers | - | Colorado Rapids | 2:0 | ||||
| 7. Journée | 16.09.2018 | Houston Dynamo | - | Portland Timbers | 4:1 | ||||
| 7. Journée | 20.09.2018 | Portland Timbers | - | Columbus Crew | 3:2 | ||||
| 7. Journée | 23.09.2018 | Minnesota United FC | - | Portland Timbers | 3:2 | ||||
| 7. Journée | 30.09.2018 | Portland Timbers | - | FC Dallas | 0:0 | ||||
| 8. Journée | 07.10.2018 | Real Salt Lake | - | Portland Timbers | 1:4 | ||||
| 8. Journée | 21.10.2018 | Portland Timbers | - | Real Salt Lake | 3:0 |
États-Unis