This week’s focus is on how the Detroit Lions can correct a recurring issue with the second level of their defense: Gap discipline. Whether it’s the linebackers or the safeties coming up to fill holes, the team can’t seem to control the gaps at the first level of the defense with their second-level players. Now, certainly, this starts up front with the team facing way too many instances when the linebackers are forced to deal with a line that simply can’t get it done. But even when the big guys are doing their job, the team struggles to keep containment both in the middle and on the edge of their defense.