Manning was selected to the last all-amateur USA national basketball team in 1988, which competed at the Summer Olympics against all-professional Soviet and Yugoslavian teams in Seoul, South Korea. The team won the bronze medal but was viewed as a disappointment, as they had been favorites to win the gold until their loss to the Soviet Union in a semi-final game. Manning failed to score even a single point in that game, and afterward called it "one of the biggest disappointments of my life."