Secret of Peyton Manning's skill

Advanced stats show that even when Peyton Manning is bad, he's good. Jeff Gross/Getty Images

Last weekend, the great Peyton Manning led the Denver Broncos to a 31-23 win over the Cincinnati Bengals. Manning has taken the Broncos on three game-winning drives in the fourth quarter this season, and he leads the NFL with a Total Quarterback Rating (QBR) of 85.4; in fact, the gap between Manning and the league's No. 2 quarterback (Tom Brady) is greater than the difference between No. 2 and No. 5 (Aaron Rodgers).

The man is 36, coming off four neck surgeries and an entirely missed season. How the heck is he doing this?