West Ham have confirmed that George John has returned to FC Dallas after his loan spell came to an end.
The 24-year-old American joined the Hammers in January on a short-term deal during the Major League Soccer close season.
He made two appearances for the development squad but was unable to break into Sam Allardyce's first team.
John was starved of opportunities due to the fine form of James Tomkins, Winston Reid and Abdoulaye Faye in defence, and the centre-back has now headed back across the Atlantic.
FC Dallas start their 2012 campaign with a game against New York Red Bulls in little over a week.