CHESTER, Pennsylvania (AP) — Chris Pontius scored in the 78th minute to lift D.C. United to their fourth straight victory with a 1-0 win over the Philadelphia Union on Saturday night.
D.C. United moved four points ahead of the New York Red Bulls for first place in the Eastern Conference. It's their first four-game winning streak since the 2008 season.
The struggling Union haven't won in six outings since a 1-0 victory over Chivas USA on April 21.
A sellout crowd of 18,876 showed up at PPL Park for the debut of interim manager John Hackworth, who was promoted when Peter Nowak stepped down on Wednesday after two-plus seasons.
Hackworth was an assistant coach under Nowak since the Union's inception in 2010.
At Vancouver, British Columbia, Sebastien Le Toux's goal in the 80th-minute gave undermanned Vancouver victory over Colorado.
Vancouver won while playing a man down after striker Darren Mattocks was sent off in the 60th minute following his second yellow card.
The Whitecaps posted their seventh victory of the season, surpassing the six they mustered in their 2011 expansion season. Vancouver moved to 25 points, six clear of Colorado in the Western Conference standings.
Davide Chiumiento created the game's only goal after his clever dribble evaded three defenders and his cross found Le Toux's who's sliding volley beat Colorado keeper Matt Pickens.
At Houston, Adam Moffat scored his first goal of the season in the 76th minute to give Houston a 2-1 win over 10-man FC Dallas.
Moffat knocked home the rebound after FC Dallas goalkeeper Kevin Hartman couldn't clear a Brad Davis corner kick.
FC Dallas played the last 26 minutes with just 10 players after Jair Benitez was given a red card for hitting Dynamo midfielder Colin Clark in the head. The incident provoked a minor melee between both teams, but cooler heads prevailed.
Earlier, Dynamo striker Will Bruin opened the scoring in the third minute before Jackson Goncalves equalized in the 59th minute. Gonclaves took advantage of Scott Sealy's initial shot cannoning off Dynamo Houston defender Jermaine Taylor to place the rebound past 'keeper Tally Hall.
At Montreal, Felipe Martin, Justin Mapp, Andrew Wenger and Lamar Neagle all scored to help Montreal beat 10-man Seattle.
Eddie Johnson scored for the Sounders who were reduced to 10 men in the 57th minute when Jhon Kennedy Hurtado was sent off for a nasty tackle on Collen Warner.