Coach Bob Bradley's 21-man roster to prepare for the USA's Oct. 17 friendly at Switzerland is comprised of three MLS players and 18 European-based players, including three German-based players (Steve Purdy, Preston Zimmermann and Sal Zizzo) who have yet to play for their clubs' first teams. Freddy Adu has a chance to make his second appearance for the full national team, for which he appeared once, in early 2006. Seven players on the roster are uncapped.

The team begins training Wednesday and Bradley will pare the roster down to 18 players on Monday, two days before the game.

"This is a great opportunity to gather many of our European-based players to have some quality time together, with the reward at the end of it being a match against a very good Switzerland team," said Bradley. "We are continuing to develop our team as World Cup qualifying approaches, and this week gives us another good chance to integrate more players into our system."

Derby County midfielder Eddie Lewis and Reading FC goalkeeper Marcus Hahnemann return to the U.S. fold for the first time since the 2006 World Cup.

Six players were part of the USA's U-20 World Cup team that advanced to the quarterfinals in Canada this past summer: Adu, Zizzo, Michael Bradley, Danny Szetela, Chris Seitz and Preston Zimmerman.

Washington state product Tally Hall, 22, who is trying to break into the first team of Danish club Esbjerg, is one of the uncapped players. Hall, like many of the inexperienced players in this group, are candidates for the U-23 U.S team that will aim to qualify for the 2008 Olympics. Bradley's assistant coach, Peter Nowak, is the U-23 head coach.

Former University of California defender Steve Purdy has started 10 games for Second Division 1860 Munich's reserve team, which plays in the German Third Division.

Preston Zimmerman has scored five goals in 12 appearances this season for First Division Hamburg SV's reserve team (Third Division).

Sal Zizzo, who joined First Division Hannover 96 after last summer's U-20 World Cup, plays for its Fourth Division team.

USA ROSTER vs. SWITZERLAND (Oct. 17)
(by position)

GOALKEEPERS
Marcus Hahnemann (Reading FC), Tally Hall (Esbjerg), Chris Seitz (Real Salt Lake).

DEFENDERS
Carlos Bocanegra (Fulham FC), Steve Cherundolo (Hannover 96), Dan Califf (Aalborg BK), Jay Demerit (Watford FC), Oguchi Onyewu (Standard de Liege), Heath Pearce (Hansa Rostock), Steve Purdy (1860 Munich).

MIDFIELDERS
Freddy Adu (SL Benfica), DaMarcus Beasley (Glasgow Rangers), Michael Bradley (SC Heerenveen), Maurice Edu (Toronto FC), Benny Feilhaber (Derby County), Eddie Lewis (Derby County), Danny Szetela (Racing Santander).

FORWARDS
Clint Dempsey (Fulham FC), Robbie Findley (Real Salt Lake), Preston Zimmerman (Hamburger SV), Sal Zizzo (Hannover 96).

USA ROSTER vs. SWITZERLAND (Oct. 17)
(alphabetic with caps/goals)
Adu, Freddy 1/0
Beasley, DaMarcus 70/15
Bocanegra, Carlos 51/7
Bradley, Michael 12/0
Califf, Dan 16/1
Cherundolo, Steve 41/1
DeMerit, Jay 6/0
Dempsey, Clint 33/8
Edu, Maurice 0/0
Feilhaber, Benny 12/2
Findley, Robbie 0/0
Hahnemann, Marcus 6/0
Hall, Tally 0/0
Lewis, Eddie 73/8
Onyewu, Oguchi 26/2
Pearce, Heath 8/0
Purdy, Steve 0/0
Seitz, Chris 0/0
Szetela, Danny 0/0
Zimmerman, Preston 0/0
Zizzo, Sal 1/0