The base defense is a stack 3-3 with three safeties back. Last season, the extra lineman on passing downs was a linebacker in terms of skill set. Which was one of the glaring weaknesses given they couldn’t manufacture a pass rush with the combinations they used unless the blitzed additional backers or DB’s.
With a few notable exceptions, the group held their own against the run - third in the league & 55 or so yards worse than league leader Weebs per game. Last seasons’ bunch wasn’t gigantic inside & they look to be fine this season in terms of depth because about half the D-end group (Sims, Deming, Brown, etc.) will be there to eat blocks so that the backers & safeties can make the plays. Hopefully, the other half will have a guy or two who can get after the QB so that they don’t have to overwork 33 & company. If they could have effectively rushed the passer last season, they’ve got one or two additional wins. Pass rusher is the key to the defense taking a step forward this season. If they get extra bodies - fine, but it’s not like the cupboard is bare.