I’ll go with the somewhat obvious answer of Jamie Collins. I’m just excited to see what adding an athlete with his potential to the linebacking corps. Mayo has been the only guy with any wheels since 2008 who can play (sorry Guyton fan club members), so adding Collins to the mix with a year of experience under his belt should really help in the all the right areas.
One under-the-radar guy is Mark Harrison, the rookie receiver out of Rutgers who never made it off PUP. He was a combine-freak and you can read more on this great piece from Mike Loyko last year.