MLS Cup Western Conference playoff pairings set

Sporting Kansas City is the last team in, while the Portland Timbers are the odd team out in the Western Conference with the playoffs set to begin this week.

The Seattle Sounders improved their playoff position with a win over Real Salt Lake while Sporting Kansas City booked its place in the postseason with a victory over the San Jose Earthquakes.

WATCH: Timbers collapse in Vancouver

A 4-1 defeat to the Vancouver Whitecaps saw the Portland Timbers eliminated from postseason contention just a year after the Timbers won the MLS Cup. And while Cascadia Cup rival the Seattle Sounders also entered the day with an uncertain fate, a 2-1 win over Real Salt Lake locked up the franchise's eighth straight trip to the playoffs. They'll face Sporting Kansas City, which topped the San Jose Earthquakes 2-0 to make sure its season continued.

READ MORE: Eastern Conference playoff pairings

FC Dallas locked up the Supporters' Shield and home-field advantage throughout the postseason with a draw against the LA Galaxy, already the No. 3 seed prior to Sunday's slate. That meant the Colorado Rapids finished second in the conference, good enough to avoid a one-off match in this week's knockout round.

Byes: No. 1 FC Dallas, No. 2 Colorado Rapids

No. 3 LA Galaxy vs. No. 6 Real Salt Lake (Wednesday, 10:30 p.m. ET, Unimas)

No. 4 Seattle Sounders vs. No. 5 Sporting Kansas City (Thursday, 10:30 p.m. ET, FS1/UniMas)