Chicago Bears - Wikipedia
Mark Bortz - Iowa Hawkeyes Player Profile
My 100 Favorite Chicago Bears of All-Time - Windy City Gridiron
Illini Connections Run Deep with Chicago Bears - University of
1992 Stadium Club #206 Mark Bortz - NM-MT
Illini Connections Run Deep with Chicago Bears - University of
WCG Top 100 Chicago Bears players of all-time: 100-1 - Windy City
Tyler Bray to play entire game vs. Bills
Bears 100: This day in Chicago Bears' History is a wrap! - Windy
Mark Bortz Signed Chicago Bears 8x10 Photo