U.S. U-23 men's national team coach Caleb Porter has called up 28 players to training camp from Dec.15-23 in Lakewood Ranch, Fla.

"At every camp we expect to push the group forward by continuing to evaluate the player pool while imprinting the concepts of how we will play as a team on both sides of the ball," said Porter in a U.S. Soccer press release. "As we sort through our personnel and start to hone in on the roster, it is equally as important that the players develop a clear understanding of the culture of how we will do things leading up to our first match in Nashville."

The U.S. was drawn into Group A of the 2012 CONCACAF Olympic Qualifying Tournament and will face Canada, Cuba and El Salvador in group matches from March 22-26 at LP Field in Nashville. The two finalists from the tournament will qualify for the 2012 Olympic Games in London next summer.

U.S. U-23 roster

Goalkeepers (4): David Bingham (San Jose Earthquakes), Bill Hamid (D.C. United), Sean Johnson (Chicago Fire), Zac MacMath (Philadelphia Union)

Defenders (8): Gale Agbossoumonde (Eintracht Frankfurt), Royal-Dominique Fennell (Stuttgarter Kickers), Sebastien Ibeagha (Duke), Kofi Sarkodie (Houston Dynamo), Zarek Valentin (Montreal Impact), Jorge Villafana (Chivas USA), Andrew Wenger (Duke), Sheanon Williams (Philadelphia Union)

Midfielders (10): Freddy Adu (Philadelphia Union), Bryan Arguez (Montreal Impact), Joe Corona (Club Tijuana), Danny Cruz (Houston Dynamo), Mikkel Diskerud (Stabæk), Dilly Duka (Columbus Crew), Jared Jeffrey (Mainz), Sebastian Lletget (West Ham United), Amobi Okugo (Philadelphia Union), Michael Stephens (LA Galaxy)

Forwards (6): Will Bruin (Houston Dynamo), Teal Bunbury (Sporting KC), Jann George (Nürnberg), Joe Gyau (Hoffenheim), Jack McInerney (Philadelphia Union), Andrew Wooten (Kaiserslautern)

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.