Pili, Wilgar, Bywater, Pyper, Tooley, Kaufusi, and Tanuvasa
That is 7 deep at LB, all with pretty significant playing time. Add in a (hopefully) healthy Ah You and it is the 3rd maybe 4th deepest position on the team.
2 deep is very solid. Getting into the 3rd stringers and there is a lot of unknown.