He's got money in the bank, a young family, and a guaranteed enshrinement in Canton. I'd venture to guess that the body of a 37 year old NFL QB equates to that of about a 60 year old mason/bricklayer/steel worker/insert physically demanding occupation here....Why put your body/family through the physical demands that one year or more would require? Nothing left to prove for sure.I wouldn’t blame him if he retires, he has nothing left to prove.