Ranking top 25 players in NFL history: Dick Butkus has prominent place on league's all-time list
WCG Top 100 Chicago Bears players of all-time: 100-1 - Windy City Gridiron
The Chicago Bears' Top 5 running backs in franchise history
Chicago Bears' long lineage of linebackers
10 Best Chicago Bears Running Backs of All Time - Sports Illustrated
Ranking best Bears of all time: Nos 1-25
Terry Schmidt: The Best Player in Chicago Bears Franchise History to Wear the Number 44 - BVM Sports
Bears in the Pro Football Hall of Fame
Top 5 Greatest NFL Quarterbacks in Chicago Bears History, by Jeffrey Genao, Top Level Sports
History of the Decatur Staleys / Chicago Bears – Staley Museum
My 100 Favorite Chicago Bears of All-Time - Windy City Gridiron