| 4. Round | 03/06/2018 | OKC Energy FC | - | Reno 1868 FC | 1:2 | ||||
| 4. Round | 10/06/2018 | Seattle Sounders 2 | - | OKC Energy FC | 2:1 |  |
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| 4. Round | 14/06/2018 | Portland Timbers 2 | - | OKC Energy FC | 1:2 | ||||
| 4. Round | 17/06/2018 | OKC Energy FC | - | Rio Grande Valley FC | 3:1 | ||||
| 5. Round | 29/07/2018 | OKC Energy FC | - | San Antonio FC | 1:2 | ||||
| 6. Round | 05/08/2018 | Colorado Springs Switchbacks | - | OKC Energy FC | 2:0 |
Ghana