Earthquakes stars Chris Wondolowski and Clarence Goodson were called to the U.S. national team Wednesday for a game against Mexico -- a big boost to the players' chances of making the World Cup roster this summer.

Coach Jurgen Klinsmann invited 22 players to camp, including American stars Clint Dempsey and Landon Donovan. The United States will play host to fellow World Cup qualifier Mexico next Wednesday at University of Phoenix Stadium.

The Quakes stars won't join the national team until after the Major League Soccer game Saturday at Buck Shaw Stadium against the New England Revolution. At age 31, it could be each player's last chance to compete in a World Cup.

Klinsmann also called German-American teen Julian Green of Bayern Munich to his first camp. Green, 18, recently decided to play for America, a decision that creates more of a logjam at Wondolowski's forward position.

"Everyone knows the clock is ticking," Klinsmann said in a statement. "This is a huge opportunity for our players to show where they are at and to make their case. They need to prove now that they badly want to go to Brazil."

The World Cup roster is expected to be named sometime in May.

The roster:

Goalkeepers: Bill Hamid (D.C. United), Sean Johnson (Chicago Fire), Nick Rimando (Real Salt Lake);


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Defenders: DaMarcus Beasley (Puebla, Mexico), Matt Besler (Sporting Kansas City), Brad Evans (Seattle Sounders), Omar Gonzalez (Los Angeles Galaxy), Clarence Goodson (San Jose Earthquakes), Michael Orozco (Puebla, Mexico), Michael Parkhurst (Columbus Crew), DeAndre Yedlin (Seattle Sounders);

Midfielders: Kyle Beckerman (Real Salt Lake), Michael Bradley (Toronto FC), Brad Davis (Houston Dynamo), Landon Donovan (Los Angeles Galaxy), Maurice Edu (Philadelphia Union), Luis Gil (Real Salt Lake), Graham Zusi (Sporting Kansas City);

Forwards: Clint Dempsey (Seattle Sounders), Julian Green (Bayern Munich, Germany), Eddie Johnson (D.C. United), Chris Wondolowski (San Jose Earthquakes).