Oscar Palmer Robertson (born November 24, 1938), nicknamed ''The Big O'', is an American retired professional basketball player who played for the Cincinnati Royals and Milwaukee Bucks. The 6 ft 5 in (1.96 m), 205 lb (93 kg) Robertson played point guard and was a 12-time All-Star, 11-time member of the All-NBA Team, and one-time winner of the MVP award in 14 professional seasons. In 1962, he became the first player in NBA history to average a triple-double for a season. In the 1970--71 NBA season, he was a key player on the team that brought the Bucks their only NBA title. His playing career, especially during high school and college, was plagued by racism.
Answer this question, making sure that the answer is supposed by the text: has an nba player ever averaged a triple double?
yes