So says Pro Football Focus:
The traditional perception that interior defensive lineman are simply run-stuffers while edge defenders are responsible for creating pressure has gone the way of the printed map with NFL teams figuring out that passing reigns supreme. Players like Aaron Donald (99.7 PFF grade and 99.9 pass-rush grade),Fletcher Cox (90.3 pass-rush grade) and Geno Atkins (89.3 pass-rush grade) have generated tremendous value because they lay waste to would-be pass blockers and cause a nightmare for the opposing quarterback. Just because the interior d-linemen of today are making a name for themselves as pass-rushers doesn’t necessarily mean that the pressures they generate are more valuable or even as valuable as those generated by their counterparts on the edge. In fact, the surfeit of pass-rush production still resides on the edge; in 2017, there were two interior linemen with a pass-rush grade over 90.0 and 10 with a pass-rush grade of 80.0-plus, meanwhile six edge rushers earned a 90.0-plus pass-rush grade and 19 hit 85.0 or above.