Jadeveon Clowney is referred to by scouts and high level executives as one of the best defensive prospects in recent seasons, but some question his mental toughness.

"He's a man amongst boys. But he's one of those guys that's a Pro Bowler, or he could be a big-time bust depending on what's on the inside," said an NFC personnel director. "That's what we'll all be digging into."

"I think there's flashes of brilliance and flashes of extreme inconsistency," said an AFC general manager. "I mean, it's a boom or bust thing. ... Does (Clowney) have all the talent in the world? Yeah. For people to get secure with him, it's going to come in the interviews, the one-on-ones with teams. They'll try to get him off the pre-scripted stuff from the agent. You have to be able to pass that smell test. Whoever drafts him is going to dig into every nook and cranny on him. And they're going to see what's in his soul."

Clowney has drawn comparisons to Julius Peppers and Jevon Kearse.