[broiler]

Adu played in a friendly match against Canada before the World Cup. I would call that a full international cap that locks him into the US squad. Apparently, he was trying to find some wiggle room that the match was an exhibition and wouldn't count as a cap that would lock him into the US squad for life. The US soccer website lists him as having 1 cap for the senior squad.

Personally, I think that he is much more likely to make the US squad than the Ghana squad in the near future. The Ghanian midfield is much better than what we have run out recently.