Chicago Bears will retire Mike Ditka's No. 89 jersey
Da Greats: Retired Chicago Bears Jersey Numbers - The Chicago Audible
Why did the Chicago Bears decide to retired the jersey number 89? - Quora
Jan. 20, 1982: Bears' coaching drama comes to end — it's Mike Ditka – Orlando Sentinel
Bears retire Ditka's No. 89 during halftime
Mike Ditka's Super Bowl sweater up for auction - CBS Chicago
Mike Ditka's Chicago Bears Jersey and Sweater Retirement Presentation Formerly Displayed at Mike Ditka's Restaurant
Mike Ditka: Career retrospective
Chicago Bears great Mike Ditka turns 80
Chicago Bears retire Mike Ditka's number
Mike Ditka: Career retrospective
Ditka's 89 final number Bears will retire