Devon Sandoval scored the only goal as Real Salt Lake went top of the MLS Western Conference with a 1-0 win at Vancouver Whitecaps.
An unmarked Sandoval rose to head home Lovel Palmer's cross in the ninth minute and send Real ahead of Seattle Sounders.
Substitute Maxim Tissot netted three minutes from time to rescue a point for Montreal Impact in a 2-2 draw at Chicago Fire.
Two second-half strikes from Mike Magee appeared to have won it for Fire after Marco Di Vaio (25) had put Montreal ahead, but Tissot nipped in to nod a loose ball into the far corner late on.
New England Revolution and Houston Dynamo played out a 1-1 draw, with goals from Saer Sene (65) and Will Bruin (76) respectively, while Toronto FC hammered DC United 4-1.
Jared Jeffrey put United ahead in the 15th minute but Toronto roared back through Darel Russell (26), Bright Dike (67) a Conor Shanosky own goal (71) and Alvard Rey (87).