The person spoke to The Associated Press on condition of anonymity Thursday because the deal has yet to be announced.
Denver selected McDermott with the 11th pick.
McDermott led the nation in scoring last season with a 26.7 average while shooting 52.6 percent from the field, including 44.9 percent from 3-point range. He finished his college career as basketball's fifth-leading scorer.
AP Sports Writer Andrew Seligman in Chicago contributed.