The 22-year-old attacking midfielder is now a member of the Philadelphia Union.
Goal.com learned on Thursday that Adu was likely headed to the Philadelphia Union, and the 22-year-old attacking midfielder was confirmed by the club as its newest member on Friday, joining on a free transfer from Portugal's Benifica.
Adu's agent told Goal.com early Friday morning that his client will not be a Designated Player.
Adu was the first overall pick of the 2004 MLS SuperDraft and spent time with D.C. United and Real Salt Lake before moving to Benfica in 2007. But his time in Europe was largely unproductive. A series of loans followed with the midfielder never really securing a home.
However, Adu broke back into the U.S. national team at 2011 Gold Cup and showed flashes of brilliance as he helped set the table for goals in the semifinal and final. Adu has been capped 17 times by the senior USA squad as well as representing the country at various youth levels.
He joins a Philadelphia side that has been near the top of the Eastern Conference all season, but is desperately in need of another goal threat after selling leading scorer Carlos Ruiz.