I know many of you don't venture to the football forum, but I just wrote up a short essay on Derek Barnett and wanted some less crazy people to read it as well and see what I was able to find out about him historically.
http://www.volnation.com/forum/tennessee-vols-football/255855-derek-barnett-vs-joey-bosa-barnett-underrated-player-lifetime.html#post12588983
Unfortunately, I don't have the time right now to read it. But any analysis probably doesn't even consider that Barnett may be the most held player that I have ever seen in my 25 years of watching UT football. Don't think they keep a stat for "times holding should have been called." Kid is great, and his presence would be even bigger if the officials called it.