Crew moved seven points clear as Guillermo Barros Schelotto's goal in the 23rd minute earned them victory in the capital, while their nearest challengers the New York Red Bulls lost 1-0 at Real Salt Lake, for whom Fabian Espindola scored the solitary goal in the fourth minute.

The win took the Utah side within a point of Western Conference leaders the Los Angeles Galaxy, while FC Dallas are third as Jeff Cunningham's 47th-minute goal was enough to beat Toronto FC.

The Colorado Rapids beat Chivas USA 3-0 thanks to an Omar Cummings brace while the New England Revolution overcame the Seattle Sounders 3-1.