Gibbens led the team in tackles last night, that's how useless that stat is, because they were all 8 yards downfield - when he wasn't busy shooting the wrong gap, or covering nobody in man coverage. Elliss same thing, Tavai same thing.
I don't doubt that they're trying out there, they're just not good enough at those positions to play them on an NFL-level.
Shoutout to Anfernee Jennings though . Not only did he get an honest-to-god sack last night (using a pass rush move, a real bull rush!), but he had to play DT the entire 4th quarter. That's a quality depth piece on a team with legitimate talent.