The Philadelphia Union and Houston Dynamo became the latest teams to be elminated from postseason contention.
The Union are out thanks to a dramatic loss to the Columbus Crew and a win by the New York Red Bulls over Toronto FC, while Houston saw their playoff dreams come to an end with a 3-1 defeat to D.C. United on Sunday.
The Union coughed up a 2-0 lead in the second half and eventually fell 3-2 to the Crew, while the Red Bulls topped TFC 3-1. With the win and Houston's loss on Sunday, the Red Bulls clinched a postseason berth.
The New England Revolution also officially clinched a spot in the postseason earlier on Saturday with a 2-2 draw against the Montreal Impact. Sporting Kansas City booked their spot with a win over the Chicago Fire on Friday night.
Real Salt Lake also clinched a postseason berth with a 2-0 win over the San Jose Earthquakes on Saturday night, while FC Dallas did the same in Sunday's 2-1 win over the already-qualified LA Galaxy.
QUALIFIED FOR PLAYOFFS:
Seattle Sounders FC, LA Galaxy, Real Salt Lake, FC Dallas (Western Conference)
D.C. United, Sporting Kansas City, New England Revolution, New York Red Bulls (Eastern Conference)
ELIMINATED FROM PLAYOFFS:
Chivas USA, Colorado Rapids, San Jose Earthquakes (Western Conference)
Montreal Impact, Chicago Fire, Philadelphia Union, Houston Dynamo (Eastern Conference)
