Shelby has started for four years, lining up at various positions across the defensive line. He is stuck between being a outside linebacker and an end -- he would bring power as an edge rusher in a 3-4 set, but could get outsized in a traditional set. He is a good all-around player who can be inconsistent but is a solid late-round pick and future rotational player.
Shelby is decent off the ball but has a burst in the open field. He can run to either side and has the strength to set the edge. He shows good reach and plays the run well. He needs to make his decisions early when rushing the passer, but when he is a force when he does. It's possible he could move outside in a 3-4 set.
Despite his playing experience, Shelby has some a major shortcoming in his ability to diagnose plays and make quick decisions on the line. He can be eliminated once engaged with a lineman, but can show starter ability if he makes a good decision and reads the play.
Future Hall of Famer
A once-in-a-generation type prospect who could change how his position is played
An impact player with the ability/intangibles to become a Pro Bowl player. Expect to start immediately except in a unique situation (i.e. behind a veteran starter).
A quality player who will contribute to the team early on and is expected to develop into a starter. A reliable player who brings value to the position.
A prospect with the ability to make team as a backup/role player. Needs to be a special teams contributor at applicable positions. Players in the high range of this category might have long-term potential.
A player with solid measurables, intangibles, college achievements, or a developing skill that warrants an opportunity in an NFL camp. In the right situation, he could earn a place on a 53-man roster, but most likely will be a practice squad player or a camp body.