Preston Mark Zimmerman (born November 21, 1988) is a retired American soccer player.
[3] Zimmerman was originally signed while he was only 17 but the contract did not become official until he turned 18, skirting FIFA's rules on foreign transfers by minors.
On January 21, 2010, he returned to Germany, signing an amateur contract for FSV Mainz 05, where he played for the reserve team.
[9] Zimmerman was a last-minute addition to the U.S. team at the 2007 FIFA U-20 World Cup in Canada following an injury to Johann Smith, but he did not see any playing time.
However it has been pointed out that many of the players active on the USMNT prior to Klinsmann's takeover hold dual nationality as well.