Colin Clark added a goal in the 49th minute and speedy Jamaican Omar Cummings came off the bench to seal the game with a goal in the 68th minute.
The Rapids (6-8-1) had scored only four goals during a four-game winless streak.
Revolution 2, Galaxy 1 : At Carson, Calif., Adam Cristman scored two goals in a four-minute span to give New England a victory over Los Angeles in a battle of division leaders.
The Revolution (10-4-3) used the victory to extend their lead in the Eastern Conference to seven points over second-place Columbus.
David Beckham scored his fifth goal of the season for the Galaxy (6-6-3), which saw its winless streak extend to three games.
FC Dallas 1, Wizards 1: Abe Thompson scored in the 91st minute to help FC Dallas tie the Kansas City at Frisco, Texas.
