High Quality Content by WIKIPEDIA articles! The Denver Pioneers are the sports teams of the University of Denver (DU). They play in the National Collegiate Athletic Association (NCAA) Division I, with most teams participating in the Western Athletic Conference (WAC). DU officially left the Sun Belt Conference for the WAC on July 1, 2012, and announced in November of that year that it would leave the WAC to join The Summit League on July 1, 2013.