Momentum is building in Colorado’s MLS title defence, with the Rapids defeating DC United 4-1 on Sunday.United have the honour of being the last side to inflict theRapids with an MLS loss – that coming last campaign in October – but they were unable to holdback a Colorado tide that resulted in three goals in the last 20 minutes ofplay at Dick’s Sporting Goods Park in Denver.The Rapids had to work hard for the result despite taking a38th-minute lead when Caleb Folan jinked his way into the area and curled aleft-shot past veteran Canada goalkeeper Pat Onstad.It was a classy way for the 28-year-old fringe Republicof Ireland international forward to open his account for his new club, having movedfrom English Championship outfit Hull City in March.The Rapids held the lead until the 70th minute, when SantinoQuaranta met Chris Korb’s right-wing delivery with a first-time volley pastMatt Pickens in Colorado’s goal.United’s good mood was not to last, however. Just a minute after the restart, AnthonyWallace’s hanging cross was expertly nodded over Onstad by Scot Jamie Smith.Folan added a third goal for the Rapids on 81 minutes, withJamaica striker Omar Cummings making it 4-1 shortly before the full-timewhistle.The result moved the Rapids to the top of the WesternConference, while DC United slipped to eighth on the Eastern Conference table.