| 6. Round | 09/08/2018 | Tulsa Roughnecks | - | OKC Energy FC | 0:3 | ||||
| 6. Round | 12/08/2018 | Tulsa Roughnecks | - | Colorado Springs Switchbacks | 2:1 | ||||
| 7. Round | 09/09/2018 | Portland Timbers 2 | - | Tulsa Roughnecks | 4:0 | ||||
| 7. Round | 16/09/2018 | Tulsa Roughnecks | - | San Antonio FC | 2:1 | ||||
| 7. Round | 20/09/2018 | Tulsa Roughnecks | - | Sacramento Republic | 1:4 |
USA