The Detroit Lions had a problem stopping the run last season. Like, a serious problem. Detroit ranked 31st in rush DVOA, allowing 2,296 yards and 135 first downs on the ground—both of which placed them in the bottom five teams in the NFL.
Of course, there’s a lot that goes into stopping the run. Your defensive front needs to be sturdy along the interior, not allowing offensive linemen to get hands on them and dictate the action. Defensive ends need to set the edge and not give runners the opportunity to bounce something outside in space.