 The Broncos were accepted into the NCAA in October 1969, and a month later into the Big Sky Conference, effective the following July.The Broncos began NCAA competition in 1970 in Division II (""College Division"" prior to 1973) in a brand new Bronco Stadium.Knap and the Broncos won three consecutive Big Sky titles from 1973 to 1975 and compiled a record of 71–19–1.