Here are the starting lineups for Colorado and Seattle. Seattle won the first leg, 2-1. The Rapids need a win to advance, and must contain Seattle to as few goals as possible due to the away-goals rule.
The Rapids have twice faced Seattle in MLS playoffs, and were defeated both times.
Post your own thoughts throughout the game here.
Match officials: Ricardo Salazar; Ian Anderson, Corey Parker; Fotis Bazakos
Colorado Rapids XI:
Zac MacMath; Marc Burch, Axel Sjöberg, Jared Watts, Eric Miller; Micheal Azira, Dillon Powers; Shkëlzen Gashi, Jermaine Jones, Sebastian Le Toux; Kevin Doyle
Seattle Sounders XI:
Stephen Frei; Joevin Jones, Chad Marshall, Román Torres, Tyrone Mears; Osvaldo Alonso, Cristian Roldan; Andreas Ivanschitz, Nicolas Lodeiro,Jordan Morris ; Nelson Valdez