United States coach Bob Bradley has named an experimental 30-man squad for a 19-day training camp leading up to a friendly match against fellow World Cup finalists Honduras on January 23.
Bradley's squad is missing a large number of regular starters and is made up of players from Major League Soccer and Scandinavian leagues - both taking winter breaks.
There are nine uncapped players in the squad and a further six who have not featured during 2009.
The U.S will face England, Algeria and Slovenia in Group C in next year's World Cup finals in South Africa.
"This is the start of six months of preparations for the World Cup, and it is important that we get started off heading in the right direction," said Bradley.
"We have had the chance to work with many of these players through their time with the national team, while others performed well for their clubs throughout last season and have earned this opportunity. We are continuing to evaluate the player pool as we move towards finalising our roster for this summer."
Squad: Goalkeepers: Kevin Hartman (Kansas City), Troy Perkins (Valerenga), Nick Rimando (Real Salt Lake), Zach Thornton (Chivas USA)
Defenders: Kevin Alston (New England Revolution), Jonathan Bornstein (Chivas USA), Jimmy Conrad (Kansas City Wizards), Omar Gonzalez (Los Angeles Galaxy), Clarence Goodson (IK Start), Chad Marshall (Columbus Crew), Heath Pearce (Dallas), Marvell Wynne (Toronto)
Midfielders: Kyle Beckerman (Real Salt Lake), Alejandro Bedoya (Orebro), Geoff Cameron (Houston Dynamo), Brad Davis (Houston Dynamo), Brad Evans (Seattle Sounders), Benny Feilhaber (Aarhus), Eddie Gaven (Columbus Crew), Sacha Kljestan (Chivas USA), Jeff Larentowicz (New England Revolution), Dax McCarty (Dallas), Brandon McDonald (San Jose Earthquakes), Chris Pontius (D.C. United), Robbie Rogers (Columbus Crew)
Forwards: Justin Braun (Chivas USA), Conor Casey (Colorado Rapids), Jeff Cunningham (Dallas), Robbie Findley (Real Salt Lake), Marcus Tracy (Aalborg).