Most NFL players say stopping the run comes down to attitude and desire.
I just think there is a soft mentality on this team...or maybe more like a non-pressure atmosphere, where employees (players) feel they can coast with no ramifications. This is a culture thing.
Good run defenses are 11 guys buying in. Corners tackling well... safeties tackling well. If a RB busts thru the DLine, for 5 yds, the LB or safety holds it there, and don't let a 5 yd run turn into a 25 yard run.
We could go trade for the biggest baddest DT, and if our defense as a whole doesn't change it won't matter.