Los Angeles Galaxy came from a goal behind to defeat Real Salt Lake 2-1 to stretch their lead in the Major League Soccer Western Conference to seven 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.
Freddy 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, Dominic Oduro scored for Chicago Fire to earn a 1-1 draw away to Houston Dynamos who had led through Colin Clark and Red Bull New York picked up a point away to Toronto FC as Thierry Henry scored in the 88th minute to cancel out Danny Koevermans' opener.