Landon Donovan was among 11 players added to the initial squad of 16 by US national team coach Jurgen Klinsmann for training ahead of an exhibition game against Scotland.
The Americans, who begin World Cup qualifying June 8, added Sunday defenders Clarence Goodson and Oguchi Onyewu, plus Donovan, Herculez Gomez and Jozy Altidore at forward. All have World Cup experience.
The other additions were defenders Geoff Cameron and Michael Parkhurst, midfielder Graham Zus, and forward Juan Agudelo, Terrence Boyd and Chris Wondolowski.
Donovan is Team USA's all-time leading scorer and also has the most appearances for any US player in World Cup qualifying with 35.
The team will train in Orlando until May 25, when Klinsmann will select the 23-man roster for the upcoming five matches. It will face Scotland in Jacksonville.
''We are excited now to get towards full numbers with the MLS guys and also the players from Europe who are coming in with great form,'' Klinsmann said. ''We want them to pick up the rhythm as fast as possible and make them understand that we are taking the next couple weeks very seriously.''
Roster:
Goalkeepers: Brad Guzan (Aston Villa), Tim Howard (Everton), Nick Rimando (Real Salt Lake);
Defenders: Carlos Bocanegra (Rangers), Geoff Cameron (Houston Dynamo), Edgar Castillo (Club Tijuana), Steve Cherundolo (Hannover 96), Clarence Goodson (Brondby), Alfredo Morales (Hertha Berlin), Oguchi Onyewu (Sporting Lisbon), Michael Parkhurst (Nordsjaelland);
Midfielders: Kyle Beckerman (Real Salt Lake), Michael Bradley (Chievo Verona), Joe Corona (Club Tijuana), Maurice Edu (Rangers), Fabian Johnson (Hoffenheim), Jermaine Jones (Schalke 04), Jose Torres (Pachuca), Danny Williams (Hoffenheim), Graham Zusi (Sporting Kansas City);
Forwards: Juan Agudelo (Chivas USA), Jozy Altidore (AZ Alkmaar), Terrence Boyd (Borussia Dortmund), Clint Dempsey (Fulham), Landon Donovan (LA Galaxy), Herculez Gomez (Santos), Chris Wondolowski (San Jose Earthquakes).
