1. Round | 04/03/2018 | Seattle Sounders | - | Los Angeles FC | 0:1 | ||||
2. Round | 22/04/2018 | Seattle Sounders | - | Minnesota United FC | 3:1 | ||||
2. Round | 30/04/2018 | Los Angeles FC | - | Seattle Sounders | 1:0 | ||||
3. Round | 10/05/2018 | Toronto FC | - | Seattle Sounders | 1:2 | ||||
3. Round | 13/05/2018 | Portland Timbers | - | Seattle Sounders | 1:0 | ||||
3. Round | 26/05/2018 | Seattle Sounders | - | Real Salt Lake | 0:1 | ||||
4. Round | 03/06/2018 | Real Salt Lake | - | Seattle Sounders | 2:0 | ||||
5. Round | 05/07/2018 | Colorado Rapids | - | Seattle Sounders | 1:2 | ||||
5. Round | 08/07/2018 | New England Revolution | - | Seattle Sounders | 0:0 | ||||
5. Round | 15/07/2018 | Atlanta United FC | - | Seattle Sounders | 1:1 | ||||
5. Round | 21/07/2018 | Seattle Sounders | - | Vancouver Whitecaps | 2:0 | ||||
7. Round | 16/09/2018 | Vancouver Whitecaps | - | Seattle Sounders | 1:2 | ||||
7. Round | 29/09/2018 | Seattle Sounders | - | Colorado Rapids | 4:0 | ||||
8. Round | 09/10/2018 | Seattle Sounders | - | Houston Dynamo | 4:1 | ||||
8. Round | 18/10/2018 | Orlando City | - | Seattle Sounders | 1:2 | ||||
8. Round | 21/10/2018 | Houston Dynamo | - | Seattle Sounders | 2:3 |