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
Gyasi Zardes scored in the opening 11 minutes and the LA Galaxy beat the Portland Timbers 2-1 on Saturday to snap the Timbers' 9-game unbeaten streak.
Je-Vaughn Watson scored the only goal of the match as New England fought off Chicago Fire at Gillette Stadium.