Two days after the USA’s 2-0 victory over Mexico, Bob Bradley was back to work — this time with the U.S. under-23 national team.

Bradley, the interim national team head coach and under-23 head coach, called 20 players into training camp that began Friday at The Home Depot Center in Carson, Calif., in preparation for a two-match tour of Japan.

Of the 20-man roster assembling in Carson, 18 are playing professionally in the United States and abroad. Tally Hall is the lone representative from Europe, having recently signed with Esjberg FB of the Danish Superligaen. He is joined in the goalkeeping ranks by Chris Seitz, the fourth overall pick in the 2007 MLS Super Draft. Chivas USA midfielder Sacha Kljestan is coming off a month-long camp training with the senior team.

Five players are also part of the current U.S. Under-20 team that recently qualified for the 2007 U-20 World Cup in Canada this summer. Quavas Kirk, Nathan Sturgis, Julian Valentin, Tim Ward and Seitz all started in the USA’s 5-0 victory against Panama that enabled the U.S. to win Group A of the CONCACAF Qualifying Tournament and secure a berth to a record sixth straight FIFA U-20 World Cup.

Valentin, a junior at Wake Forest, and Rob Valentino, who was named the 2006 WCC Player of the Year at San Francisco, were the only current collegians called into the camp.

U.S. U-23 ROSTER:
Goalkeepers (2): Tally Hall (Esjberg FB), Chris Seitz (Real Salt Lake).
Defenders (7): Hunter Freeman (Colorado Rapids), Michael Harrington (Kansas City Wizards), Patrick Ianni (Houston Dynamo), Nathan Sturgis (Los Angeles Galaxy), Julian Valentin (Wake Forest Univ.), Rob Valentino (Univ. of San Francisco), Tim Ward (Columbus Crew).
Midfielders (7): Arturo Alvarez (FC Dallas), Nico Colaluca (Colorado Rapids), Stuart Holden (Houston Dynamo), Will John (Kansas City Wizards), Quavas Kirk (Los Angeles Galaxy), Sacha Kljestan (Chivas USA), Ryan Solle (New England Revolution).
Forwards (4): Chad Barrett (Chicago Fire), Adam Cristman (New England Revolution), Jacob Peterson (Colorado Rapids), Jamie Watson (Real Salt Lake).