| 1. Round | 18/03/2018 | OKC Energy FC | - | Tulsa Roughnecks | 1:0 |  |
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| 1. Round | 31/03/2018 | Tulsa Roughnecks | - | Orange County SC | 0:5 | ||||
| 2. Round | 05/04/2018 | Tulsa Roughnecks | - | Portland Timbers 2 | 0:0 | ||||
| 2. Round | 19/04/2018 | Fresno FC | - | Tulsa Roughnecks | 2:2 | ||||
| 2. Round | 29/04/2018 | Sacramento Republic | - | Tulsa Roughnecks | 1:1 | ||||
| 3. Round | 06/05/2018 | Las Vegas Lights FC | - | Tulsa Roughnecks | 1:1 | ||||
| 3. Round | 20/05/2018 | San Antonio FC | - | Tulsa Roughnecks | 1:1 | ||||
| 4. Round | 03/06/2018 | Los Angeles Galaxy II | - | Tulsa Roughnecks | 1:0 | |
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| 4. Round | 17/06/2018 | Phoenix Rising | - | Tulsa Roughnecks | 3:0 |  |
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| 4. Round | 28/06/2018 | Tulsa Roughnecks | - | Los Angeles Galaxy II | 2:0 | ||||
| 4. Round | 01/07/2018 | Tulsa Roughnecks | - | Las Vegas Lights FC | 2:2 | ||||
| 5. Round | 08/07/2018 | Rio Grande Valley FC | - | Tulsa Roughnecks | 1:1 | ||||
| 5. Round | 22/07/2018 | Colorado Springs Switchbacks | - | Tulsa Roughnecks | 4:2 | |
Germany