Re: Manning surpasses Tarkenton
The number of games doesn't have much to do with it for the guys ahead of him.
It doesn't surprise me that some of Tarkenton's records are being broken. After all, seasons are 16 games long now & were only 14 game seasons when Tarkenton played. Plus the quarterbacks are much more protected by league rules than they were then.
Tarkenton got to that total in over 240 games, while Manning, Marino, and Favre all did it between 180-195 games.
It'll give more people a shot though as things go on, especially if they move to 18 game seasons at some point, but it's not the driving factor right now.
Part of the reason is the rules, as you said.
Part is the style of play.
But the average number of points scored has only gone from about 19-20/game in the 70's to 21-22/game in recent years.
At some point all of these guys are just great players.
And Manning in particular is as good as it gets.
When the age of the Vikings came to a close, they must have sensed it. Probably, they gathered together one evening, slapped each other on the back and said, "Hey, good job." - Jack Handey [Deep Thoughts]