Denver Broncos' Peyton Manning remains passionate, productive approaching 17th NFL season
Peyton Manning expected to retire Monday after 18 NFL seasons
Peyton Manning to announce retirement Monday - ABC News
Peyton Manning's “Last Rodeo” with Broncos: The interceptions. The injury. The return. The Super Bowl title. – The Denver Post
Buckley: Questions will follow Peyton Manning into retirement – Boston Herald
Broncos QB Peyton Manning to retire after 18 NFL seasons
Peyton Manning to retire after 18 NFL seasons
For Peyton Manning, the Setting Is Perfect for a Curtain Call - The New York Times
AP source: Peyton Manning to retire after 18 NFL seasons
Void Left by Peyton Manning May Be Larger for N.F.L. Than for Broncos - The New York Times
Peyton Manning to retire after 18 seasons in NFL
Manning Makes It Official, Retires From Broncos, NFL