Colorado Rapids defeated Portland Timbers 1-0 on Saturday to secure a berth in the MLS Cup playoffs, as LA Galaxy s postseason participation was also guaranteed.
Sebastian Le Toux scored the only goal of the game for the Rapids in the 63rd minute at Dick s Sporting Goods Park following good work by Marlon Hairston.
Colorado are now assured of a first playoff appearance since 2013, rivals Sporting Kansas City having lost 3-1 at New England.
That result, sealed by strikes from Kei Kamara and Juan Agudelo in the first and second half respectively, together with a Kevin Ellis own-goal, kept the Revolution s slim postseason hopes alive.
Walker Zimmerman headed home Mauro Diaz s corner in the 39th minute as Western Conference leaders Dallas saw off LA Galaxy 1-0 at Toyota Stadium, but, thanks to results elsewhere, the beaten visitors are now also assured of a role in the playoffs.
New York Red Bulls held off Philadelphia Union to win 3-2 and regain control in the race for the Eastern Conference s coveted top two, Bradley Wright-Phillips on target to join New York City s David Villa on 21 goals in the running for the golden boot.
Lamar Neagle scored both goals as DC United came from behind to beat Toronto 2-1, while Columbus Crew eased to a 3-0 win over Chicago Fire.
San Jose Earthquakes saw off Real Salt Lake 2-1 at home.