Playing their third game in eight days, the Revolution beat the Fire 1-0 on Saturday courtesy of a late Je-Vaughn Watson strike.
Victor Ulloa's stunning strike from distance helped FC Dallas come back to earn a point at Colorado.
Houston and Vancouver played to a scoreless draw at BBVA Compass Stadium.
Major League Soccer: Victor Ulloa (82'), Colorado Rapids 1-1 FC Dallas
Je-Vaughn Watson scored the only goal of the match as New England fought off Chicago Fire at Gillette Stadium.
Didier Drogba's hat trick allowed the Impact to cruise past the Union at the Stade Saputo in Montreal.