Frank Tripucka, first Denver Broncos QB, dies at 85 years old
Broncos unveil retired numbers tribute in pregame ceremony
On Peyton Manning, Broncos quarterback
Broncos to unveil retired number signage Sunday
Peyton Manning retirement: How he changed the game - Sports
Peyton Manning retirement: Broncos should re-retire the No. 18
Ex-Broncos QB wouldn't mind if No. 18 was reissued to Manning
Peyton Manning retirement: How he changed the game - Sports
Paige: Broncos can honor No. 18, Frank Tripucka, with a victory
NFL teams should stop retiring jersey numbers - Sports Illustrated