The National Basketball Association is an organization Oscar Robertson formerly played for.
Oscar Palmer Robertson ( born November 24 , 1938 ) , nicknamed `` The Big O '' , is an American former National Basketball Association player who played for the Cincinnati Royals and Milwaukee Bucks . Robertson is a two-time Naismith Memorial Basketball Hall of Fame inductee , having been inducted in 1980 for his individual career , and in 2010 as a member of the 1960 United States men 's Olympic basketball team and president of the National Basketball Players Association .