Kansas City has won all of its seven games this season and moved 11 points in front of second-place New York in the Eastern Conference.
Collin took advantage of a loose ball that he put in the back of the net for his third goal of the season. Pressure from Collin caused Vancouver to suffer an own goal in the first half and Kei Kamara made it a 3-0 game in the 65th minute.
Vancouver's only goal came from Sebastien Le Toux in the 80th minute. The Whitecaps lost their second in a row and fell to 2-2-2.