Raul Ruidiaz scored a goal in each half and the Seattle Sounders beat the Vancouver Whitecaps 4-0 on Tuesday night.
The Sounders (6-6-1) also got goals from Alex Roldan and Nicolas Lodeiro.
The Whitecaps (5-8-2) did not have a shot on goal.
Both teams play Saturday. The Sounders host Los Angeles FC and the Whitecaps visit Dallas.