Los Angeles Galaxy came from a goal behind to defeat Real Salt Lake 2-1 and stretch their lead in the Major League Soccer Western Conference to seven points.
Fabian Espindola had given the visitors the lead on the stroke of half-time, but Chad Barrett equalised on the hour before a Nat Borchers own goal handed Galaxy the points.
Eastern Conference leaders Sporting Kansas City are only two points clear after drawing 1-1 away to San Jose Earthquakes.
The home side went ahead after 85 minutes through Chris Wondolowski but Teal Bunbury earned his side a point when he netted a minute later.
Sounders bounce back
Fredy Montero scored twice as Seattle Sounders came from behind to win 2-1 against New England Revolution, who had led through Diego Fagundez.
Drew Moor scored the only goal as Colorado Rapids beat FC Dallas 1-0, while Dominic Oduro scored for Chicago Fire to earn a 1-1 draw away to Houston Dynamo, who had led through Colin Clark.
New York Red Bulls picked up a point away to Toronto FC as Thierry Henry scored in the 88th minute to cancel out Danny Koevermans' opener.