Chicago Bears to retire Mike Ditka's number, which they say will be the last - Windy City Gridiron
Why did the Chicago Bears decide to retired the jersey number 89? - Quora
Bears to retire Ditka's No. 89
Mike Ditka: Career retrospective
The 50-Year Plan: how the Bears can unretire numbers and honor more legends - Windy City Gridiron
Mike Ditka turns 80 today. Here's a look at his remarkable life, by the numbers.
Chicago Bears officially retire Mike Ditka's No. 89
Jan. 20, 1982: Bears' coaching drama comes to end — it's Mike Ditka – Orlando Sentinel
Da timing a bit off for Da ceremony
Bears say Mike Ditka's 89 will be the last number they retire - NBC Sports
Hey, Mike Ditka … you're a jerk! Ex-Bears coach rips those that get all political while getting all political – New York Daily News
Chicago Bears will retire Mike Ditka's No. 89 jersey
Jan. 20, 1982: Bears' coaching drama comes to end — it's Mike Ditka – Orlando Sentinel
Chicago Bears to retire Mike Ditka's No. 89 – Twin Cities