| 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 | 10/05/2018 | Tulsa Roughnecks | - | Reno 1868 FC | 1:1 | ||||
| 3. Round | 13/05/2018 | Tulsa Roughnecks | - | Phoenix Rising | 1:5 | ||||
| 3. Round | 20/05/2018 | San Antonio FC | - | Tulsa Roughnecks | 1:1 | ||||
| 3. Round | 27/05/2018 | Tulsa Roughnecks | - | OKC Energy FC | 1:1 | ||||
| 4. Round | 03/06/2018 | Los Angeles Galaxy II | - | Tulsa Roughnecks | 1:0 |  |
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| 4. Round | 10/06/2018 | Tulsa Roughnecks | - | Saint Louis FC | 0:3 | ||||
| 4. Round | 17/06/2018 | Phoenix Rising | - | Tulsa Roughnecks | 3:0 | ||||
| 4. Round | 24/06/2018 | Orange County SC | - | Tulsa Roughnecks | 6:1 | |
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| 4. Round | 28/06/2018 | Tulsa Roughnecks | - | Los Angeles Galaxy II | 2:0 | |
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| 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 | ||||
| 8. Round | 07/10/2018 | Tulsa Roughnecks | - | Rio Grande Valley FC | 1:2 |
Mexico