Is Peyton Manning's 2015 season the worst ever for a QB starting in the Super Bowl?
Peyton Manning Had The Worst Season Of Any Super Bowl Quarterback Ever
Denver Broncos and Peyton Manning Off to a Slow Start
Peyton Manning becomes first quarterback in NFL history to win 200 games as starter - Stampede Blue
In Peyton Manning's Woes and Andrew Luck's Grit, a Torch Seemingly Passed - The New York Times
NFL starting quarterback power rankings - 2015
Peyton Manning Was At His Worst, But He's Still The Best
The greatest QB season ever? 2013 may not even be best of Peyton Manning's career - Sports Illustrated
Peyton Manning on Broncos backup role: 'I will help in anyway I can' – The Denver Post
James Bennett column: Should Peyton Manning retire?
Peyton Manning Was Replaced by Brock Osweiler in the Second Half.
Can Peyton Manning bounce back this season?, PFF News & Analysis
Studs & Duds: Peyton Manning's best (and worst) games with the Denver Broncos - Mile High Sports
Colts top 11 quarterbacks: From Peyton Manning to Chris Chandler
Every Super Bowl Ranked, From Worst to Best of All Time - Men's Journal