| 2. Round | 15/04/2018 | Las Vegas Lights FC | - | Sacramento Republic | 1:1 | ||||
| 2. Round | 19/04/2018 | Sacramento Republic | - | Colorado Springs Switchbacks | 2:1 | ||||
| 2. Round | 29/04/2018 | Sacramento Republic | - | Tulsa Roughnecks | 1:1 | ||||
| 3. Round | 06/05/2018 | Seattle Sounders 2 | - | Sacramento Republic | 1:2 | ||||
| 3. Round | 20/05/2018 | Phoenix Rising | - | Sacramento Republic | 1:3 |  |
|||
| 4. Round | 03/06/2018 | Sacramento Republic | - | Orange County SC | 1:0 | ||||
| 4. Round | 10/06/2018 | Sacramento Republic | - | Phoenix Rising | 0:0 | ||||
| 4. Round | 14/06/2018 | Fresno FC | - | Sacramento Republic | 0:1 | ||||
| 4. Round | 24/06/2018 | Sacramento Republic | - | Saint Louis FC | 2:2 | ||||
| 4. Round | 01/07/2018 | Fresno FC | - | Sacramento Republic | 2:0 |
Mexico