| 1. Jornada | 24.03.2018 | FC Dallas | - | Portland Timbers | 1:1 | ||||
| 2. Jornada | 01.04.2018 | Chicago Fire | - | Portland Timbers | 2:2 | ||||
| 2. Jornada | 08.04.2018 | Orlando City | - | Portland Timbers | 3:2 |  |
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| 2. Jornada | 15.04.2018 | Portland Timbers | - | Minnesota United FC | 3:2 | ||||
| 3. Jornada | 27.05.2018 | Colorado Rapids | - | Portland Timbers | 2:3 | ||||
| 4. Jornada | 02.06.2018 | Portland Timbers | - | Los Angeles Galaxy | 1:1 | ||||
| 4. Jornada | 24.06.2018 | Atlanta United FC | - | Portland Timbers | 1:1 | ||||
| 4. Jornada | 30.06.2018 | Seattle Sounders | - | Portland Timbers | 2:3 | ||||
| 6. Jornada | 19.08.2018 | Sporting Kansas City | - | Portland Timbers | 3:0 | ||||
| 6. Jornada | 30.08.2018 | Portland Timbers | - | Toronto FC | 2:0 | ||||
| 7. Jornada | 02.09.2018 | New England Revolution | - | Portland Timbers | 1:1 | ||||
| 8. Jornada | 07.10.2018 | Real Salt Lake | - | Portland Timbers | 1:4 | ||||
| 8. Jornada | 28.10.2018 | Vancouver Whitecaps | - | Portland Timbers | 2:1 |
Nueva Zelanda
Samoa