Peyton Manning retires after 18 seasons
Peyton Manning, American Football Wiki
Are the Dolphins creating a backlog of jersey numbers to retire? - The Phinsider
Frank Tripucka, first Denver Broncos QB, dies at 85 years old
Frank Tripucka, inaugural QB for Denver Broncos, dies
Floyd Little, Broncos Hall of Fame running back, dies at age 78 – Greeley Tribune
J.J. Watt gets Marshall Goldberg's No. 99 as Cardinals unretire jersey
Today in Sports - Week Ahead, September 15 - September 21
Peyton Manning - Wikipedia
Ex-Broncos QB wouldn't mind if No. 18 was reissued to Manning, News
Peyton Manning to retire after 18 NFL seasons, five MVPs, two titles and numerous records
Peyton Manning Will Wear No. 18 In Denver, Though It Was Retired In Honor Of Frank Tripucka. What's The Big Deal About Numbers?
Peyton Manning, American Football Database