Yedlin, who signs a four-year deal, will join Spurs ahead of the 2015-16 season.
The 21-year-old made his way through the Sounders’ academy, before signing a professional deal with the club in 2013. He has been named in the MLS All-Star team in consecutive seasons.
By nature a right-back, but also comfortable on the right of midfield, Yedlin impressed from the bench at this summer’s World Cup. He has made seven international appearances in his career so far.