Why Mercilus is on the list
Mercilus made just four starts, but he finished with six sacks and two forced fumbles, displaying the speed and instincts of a player who eventually could become an annual double-digit sack artist.
Mercilus isn't a finished product. ProFootballFocus.com studied every snap of Mercilus' rookie year and ranked him 29th among 34 outside linebackers in a 3-4 scheme.
From everything we've heard from the Texans, Mercilus will be expected to become an impact playmaker on a regular basis in 2013.