CARSON, Calif. -- Freddy Adu was released from the U.S. national team training camp and will join D.C. United when it starts preseason training next week.
The 16-year-old forward made his national debut as a late substitution in a scoreless tie against Canada on Jan. 22, then didn't play in Sunday's 5-0 win over Norway.
Midfielder Steve Ralston, who has a strained right quadriceps, also was dropped from the training camp roster, U.S. team spokesman Michael Kammarman said Thursday.
As players returned after three days off, forward Eddie Johnson resumed training for the first time since bruising his right calf against Canada. He is hoping to be ready for the team's next game, against Japan on Feb. 10 at San Francisco.
Twenty-six players remain in camp.
Preparing for the World Cup, the Americans play Guatemala on Feb. 19 at Frisco, Texas. European-based players will then be added to the roster for a March 1 game against Poland at Kaiserslautern, Germany. After that, the United States plays Germany on March 22 in Dortmund.