I watched Nevada 7 times this year primarily for him - but came away liking Rishard Matthews more as a prospect.
Johnson I have as a fourth/fifth rounder. Primary reason I don't rate him any higher is that he gets eaten up by blockers too much. When he sees it and gets downhill, looks very good - made some highlight plays.
Combine workout was good - but shuttle and cone times were both poor (slowest cone in the ILB group) - so gives you a picture of a straight liner and not sure that's the best thing to be at LB.