| 4. Round | 24/06/2018 | Orange County SC | - | Tulsa Roughnecks | 6:1 | ||||
| 5. Round | 29/07/2018 | Tulsa Roughnecks | - | Fresno FC | 1:1 | ||||
| 6. Round | 12/08/2018 | Tulsa Roughnecks | - | Colorado Springs Switchbacks | 2:1 | ||||
| 6. Round | 19/08/2018 | Real Monarchs SLC | - | Tulsa Roughnecks | 3:2 | ||||
| 6. Round | 26/08/2018 | Saint Louis FC | - | Tulsa Roughnecks | 3:2 | ||||
| 6. Round | 30/08/2018 | Swope Park Rangers | - | Tulsa Roughnecks | 2:1 | ||||
| 7. Round | 06/09/2018 | Seattle Sounders 2 | - | Tulsa Roughnecks | 4:4 | ||||
| 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 | ||||
| 7. Round | 23/09/2018 | Tulsa Roughnecks | - | Swope Park Rangers | 1:1 | ||||
| 8. Round | 07/10/2018 | Tulsa Roughnecks | - | Rio Grande Valley FC | 1:2 | ||||
| 8. Round | 14/10/2018 | Tulsa Roughnecks | - | Seattle Sounders 2 | 1:4 |
USA