This article describes the problems this team has been having against the run about as well as anything I've read this year:
https://arrowheadaddict.com/2019/10/...s-run-defense/
In a nutshell, our interior DLs aren't getting any penetration, Okafor is getting beat consistently by TEs (Ogbah has been more productive so far), and our LBs are disagreeing on the field about their gap assignments. Bottom line, it's the middle of the DL that is giving up the vast majority of the yards on the ground. That's Jones, Nnadi, Xavier Williams, etc. not getting penetration, and/or not playing their gaps correctly.
Runs to Clark's side when he's on the field are averaging 3 yds or less.