Peyton Manning: NFL's all-time passing leader
Peyton Manning to retire after 18 NFL seasons
For Pro Athletes, Knowing When It's Time To Call It Quits : NPR
Peyton Manning to retire after 18 NFL seasons
Manning Makes It Official, Retires From Broncos, NFL
Everyman and superman: Sundays won't be the same without Peyton Manning, NFL
Colts to retire Peyton Manning's No. 18, honor him with statue
Peyton Manning makes call to retire after 18-year career - ABC7 Chicago
Peyton Manning to Retire After 18 NFL Seasons – The Hollywood Reporter
Peyton Manning calling it a career after 18 NFL seasons
Peyton Manning to retire after 18 NFL seasons
Peyton Manning - Wikipedia
Emotional Peyton Manning announces retirement from the NFL