Colts can still count on Peyton Manning – Twin Cities
Why are this year's NFL rookie QBs struggling so much? - The Boston Globe
Will the NFL suffer a post-Tom Brady ratings dip? Here's what experts say
Peyton Manning retires from football after 18 NFL seasons – The Denver Post
Peyton Manning - Wikipedia
Peyton Manning's “Last Rodeo” with Broncos: The interceptions. The injury. The return. The Super Bowl title. – The Denver Post
The NFL misses Peyton Manning
Aaron Rodgers' injury deepens Jets' unparalleled run of misery
Peyton Manning retires from NFL; Tom Brady: 'He set the standard' - Sports Illustrated