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Peyton Manning is now 36 years old and entering his 14th NFL season.
While some are predicting great numbers from the four-time MVP, you shouldn't expect Manning come right out and throw for 4,000 yards and 30 touchdowns.
Over the last ten seasons, only three 36-year-old (or older) quarterbacks have thrown for 4,000 yards a combined total of just four times—Rich Gannon, Kurt Warner and Brett Favre, twice. As for the the 30 TD mark, that has only been accomplished by two 36-year-old quarterbacks: Favre and Warner. Granted, none of those QBs have had the career that Manning has, perhaps with the exception of Favre.
However, Father Time doesn't acknowledge a player's lifetime achievements. You can bet Manning will feel the effects of his age in 2012 and so will fantasy owners who elect to draft the 11-time Pro Bowler.
Remember, Manning was already on the decline prior to his neck injury. While he threw for 4,700 yards in 2010 he averaged under seven yards per pass completion for the first time since his rookie season.
Realistic expectations for Manning this upcoming season are for him to throw for about 3,200 to 3,600 yards and 22 to 25 touchdowns. Those numbers, according to last season's standards, would put Manning in the company of guys like Mark Sanchez and Andy Dalton—not exactly top fantasy quarterbacks.