End of the "Dalton Scale"?

[fredtoast]

(05-27-2015, 08:23 AM)djs7685 Wrote: Kitna was 3rd in TDs, 7th in yards, and 9th in passer rating. How many times did Andy have a season like that? The answer is the same amount of times as Jon Kitna.

But Kitna didn't achieve those numbers until his 7th season in the league.

According to you it is impossible for a QB to get any better after his fourth season.

So how is it possible that Kitna did not achieve that level of success until after he ahd been in the league 6 years?