After retiring from the NFL, Treadwell attended law school at the University of Denver and participated in the campaign to pass a ballot measure to fund the replacement for Mile High Stadium which ultimately became known as Invesco Field at Mile High. That led to a new career in the media. He became a sports talk show host at Denver-based Clear Channel corporation stations KOA and KTLK before moving to Denver's KDVR-TV (Fox 31) as sports director and anchor from 2000 to 2004. He reportedly left the station to "pursue business interests in a land development company." He now works for Biltmore Development and is chairman of the board of directors of the St. Anthony North Health Foundation, affiliated with St. Anthony North Hospital in Westminster, Co., a suburb just north of Denver.