| 1. Round | 18/03/2018 | OKC Energy FC | - | Tulsa Roughnecks | 1:0 |  |
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| 4. Round | 10/06/2018 | Seattle Sounders 2 | - | OKC Energy FC | 2:1 | ||||
| 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 | ||||
| 4. Round | 24/06/2018 | OKC Energy FC | - | Los Angeles Galaxy II | 1:0 | ||||
| 5. Round | 05/07/2018 | San Antonio FC | - | OKC Energy FC | 1:1 | ||||
| 5. Round | 08/07/2018 | OKC Energy FC | - | Colorado Springs Switchbacks | 1:1 |  |
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| 5. Round | 12/07/2018 | OKC Energy FC | - | Las Vegas Lights FC | 6:4 | |
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Ghana