Dick Butkus' alma mater honors him with jersey-statue tribute
NFL jersey number restrictions could change for running backs, receivers, tight ends, linebackers, defensive backs
The 50-Year Plan: how the Bears can unretire numbers and honor more legends - Windy City Gridiron
Bears won't retire any more numbers after Mike Ditka's
Da Greats: Retired Chicago Bears Jersey Numbers - The Chicago Audible
NFL, sports legends remember Chicago Bears legend Dick Butkus – NBC Sports Chicago
Which Chicago Bulls numbers are retired? – NBC Sports Chicago