| 3. Jornada | 13.05.2018 | Seattle Sounders 2 | - | Portland Timbers 2 | 0:1 | ||||
| 4. Jornada | 10.06.2018 | Seattle Sounders 2 | - | OKC Energy FC | 2:1 | ||||
| 7. Jornada | 09.09.2018 | Sacramento Republic | - | Seattle Sounders 2 | 3:0 | ||||
| 7. Jornada | 23.09.2018 | Rio Grande Valley FC | - | Seattle Sounders 2 | 3:0 | ||||
| 7. Jornada | 30.09.2018 | San Antonio FC | - | Seattle Sounders 2 | 3:1 | ||||
| 8. Jornada | 04.10.2018 | Seattle Sounders 2 | - | Los Angeles Galaxy II | 2:2 | ||||
| 8. Jornada | 07.10.2018 | Orange County SC | - | Seattle Sounders 2 | 2:1 |  |
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| 8. Jornada | 11.10.2018 | Seattle Sounders 2 | - | Colorado Springs Switchbacks | 2:2 | ||||
| 8. Jornada | 14.10.2018 | Tulsa Roughnecks | - | Seattle Sounders 2 | 1:4 |
Estados Unidos
El Salvador