DeAndre Yedlin was substituted at halftime of Wednesday's night's Western Conference Knockout Round match due to a right ankle sprain, according to the Seattle Sounders.
The rookie right back went up to challenge an aerial ball with Colorado forward Deshorn Brown in the 41st minute of the game and came down awkwardly. (See video above.)
He was replaced in the second half by Marc Burch.
The 20-year-old Yedlin played more minutes during the 2013 regular season (2,710) than any other Sounders player. He made 30 starts.