Conversation so far:
What was one of the youth teams Freddy Adu played on?
U.S. Olympic Development Program
Was there another team Freddy Adu played on after playing with the U.S. Olympic Development Program?
At the age of 14, Adu became the youngest American ever to sign a major league professional contract in any team sport when he was chosen by D.C. United.

Question: What position did he play?
Self-contained rewrite: What position did Freddy Adu play?