With the MLS transfer window not open until July 15, the 25 year old, who made 29 appearances for City's first team and was a major player in the Sky Blues Reserves winning the Birmngham Senior Cup in 2007, cannot complete a deal which is subject to international clearance being received.
If everything goes through, Birchall will team up with England international David Beckham on July 16th when they travel to New York Red Bulls and three days, feature against AC Milan in a friendly.