Great info. I think YPP is the clearly more useful stat over Total Yards, but I still believe it needs to be used in conjunction with 3rd down % and RZ%.
So last year's D was very good in YPP, but shaky (53th) in 3rd down % and shaky (47th) in RZ% .
This year, we're 41st in YPP, but also 45th...