Looks like the "big club" Adrian Hanauer was referring to is Tottenham Hotspur. According to Goal.com, Yedlin is currently in London undergoing a physical with the English Premier League side and will rejoin the Sounders after finalizing terms of the offer over the weekend.
The same story suggests Spurs will play a transfer fee of about $3.5 million and leave Yedlin in Seattle for at least the rest of the year and then possibly loan him out.