NFL Defenses that allowed 14 PPG or less in a season

[JohnTurney]

I think an era adjustment is required.

Then further, an opponent adjustment is required.

Then a Special Teams Adjustment is required - to break ties when there are small differences.

How many points did your DEFENSE give up versus what your opponents of your era expect them to if they were not playing you.

I did a version of this a while back and the '63 Bears were very favorable - not #1 but shot up the rankings, if I remember correctly.

To me the "best D calc" is PPG Allowed (x/returns) / PPG of opponents in the same season against other teams (x/returns)

could also add in pick 6s and scoop and scores by defensive unit -- as a "net points allowed"

[CSKreager]

The Vikings defense does deserve credit but there is a reason it was called the black and blue division. Not much offense from any team.

That 1970 team it should be noted took care of business against the better teams on their schedule: 5-0 vs the Rams, Cowboys, Lions and Chiefs (all of which finished above .500)

In a 14 game schedule that’s closer to half their games compared to a 16 gamer

If anything they faced a stronger schedule than their 1971 brethren