These guys outside of 2, are mainly camp guys you need to lower the workload in starters and is ONLY the start before draft and undrafted free agents. The lower end of roster is very fluid with a revolving door.
Not trying to argue, but I suspect every team has a starter or two like this. Barnes is the only starter in that list and he only plays about 50% of the defensive snaps. If BakhT and Jenkins are good to go, Nijman never sees the field. He's purely a back-up swing tackle at this point and I'd be surprised if he's ever much more than that. He may be the starter for awhile to start the season, but that's only because a true starter is injured.