Underhill seems to think he does some of what Baun did (not sure if he thinks there is pass rusher upside) and some of what Werner does. He thinks he's here as the #3 LB to play SLB, compete at WIL, and has a niche as a QB spy. He's apparently very good as a spy (makes sense given his speed) and we all know mobile QBs are a major issue for our defense.