My guess is this is for the PUP players... and a LB will be next... LB Robert Francois or ILB Matt Wilhelm or ODiyral Briggs.
~ Francois has been around longer and should know the system the best but hasn't done too much and got leap frogged at OLB by new OLB Erik Walden. Also has played on some STs and has played both OLB and ILB.
~ Wilhelm is a vet who's hasn't done too much other than start one season and back-up and STs a lot of seasons at ILB.
~ Briggs is very raw but very athletic 4-3 DE who's too small to play there other than maybe a KGB role of pass rush and limited run stopping... he's been trying to covert to OLB. But he's having troubles... he needs an attacking system... one that he knows what he's doing before the snap... and not one that is based on reading the offense after the snap of the ball because he has big trouble with that.