Dolphins DC Anthony Weaver sums up Modern Defense in 15 seconds:
"A lot of Defenses are playing Split Safety (2-High) Shell with smaller Linebackers who have to eliminate space, you better have the requisite girth up front to keep those LB's clean."
Some similarities between what's happening in the NBA that's happening in the NFL. As the norm gets faster and smaller - if you're able to play big, you can punish/bully the oppositions lack of size.
I guess part of me just misses when "PFs" were guys like Anthony Mason, Charles Oakley, Rick Mahorn, Elden Campbell...
In 1995, 7'0 Kevin Willis was listed as a PF for the Hawks