Mehdi Ballouchy scored in the 67th minute and the Colorado Rapids beat D.C. United at Washington’s RFK Stadium for the first time in 11 years, 1-0, on Saturday night.
Matt Pickens made three saves for his second shutout of the season.
Colorado (4-3-1), which snapped a two-game losing streak, hadn’t won RFK Stadium in MLS play since July 10, 1999, going 0-7-4 since then.
United (1-7-0) is off to the worst start in franchise history.
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Fire 2, at Wizards 2: Kei Kamara scored two second-half goals to help Kansas City tie Chicago.
At Crew 1, Chivas USA 0: Guillermo Barros Schelotto scored on a penalty kick in the 90th minute to lift unbeaten Columbus (4-0-2) past Chivas USA (3-5-1).
Earthquakes 0, at Revolution 0: San Jose extended its unbeaten streak to three matches after a scoreless tie with New England.
The Earthquakes (4-2-1) have not allowed a goal in the three matches, while the Revolution (2-5-2) was held scoreless for the fifth time this season and is winless in six matches.
Preston Burpo, who played for the USL Seattle Sounders from 1997-2005, recorded the shutout for the Revolution.
FC Dallas 1, at Union 1: Philadelphia rookie Danny Mwanga scored in the 94th minute for the draw between FC Dallas (2-1-5) and Philadelphia (1-5-1).
Brek Shea scored his first career goal in the 13th minute for FC Dallas.
Toronto FC 0, at Galaxy 0: Stefan Frei made four saves in the final 17 minutes to help Toronto FC tie Los Angeles.
Toronto (3-4-1) earned its first point in five road games, while the Galaxy (7-0-2) maintained its best start since winning first nine games in 1998.