Colorado Foxes 3 - 0 Seattle Sounders Harris (C) 6' McCreath (C) 13' Lujan (C) 30'
The Foxes scored all three goals in the first half, handing the Sounders their worst loss of the season.
The third-place Sounders (18 points) entered the match one point behind Colorado, the league's highest scoring club at 2.18 goals per match. The loss leaves Seattle eight points behind A-League leader Montreal.
Dominating the first half, Colorado got their opening goal six minutes into the match when rookie Wolde Harris connected on a 30-yard blast. The goal was Harris' eighth of the season and fourth against Seattle in four games.
Midfielder Anthony McCreath notched Colorado's second goal in the 13th minute, knocking home a blast from 27 yards out.
Aaron Lujan finished the scoring at 30 minutes with a tap-in goal.
Despite allowing the three goals, Seattle outshot Colorado 14-12.