Would we see the same thing if you used BMI instead of weight?

What if you also included weight and/or BMI of offensive linemen? If linemen are getting heavier (I think they are), then having faster pass-rushers would be the best antidote. Whereas, ~30 years ago it may have been a more successful strategy to just have BIGGER pass rushers to try to overpower the offensive line.

Also, do we know what the source of height/weight information is? Are players more likely to lie about their weight now and say they are lighter? Are teams more willing to lie about weight for some sort of gamesmanship?

Interesting stuff. I agree that player weight is also tricky to measure because it fluctuates so much. But what else can we do?