Talent evaluators who have done the tape on defensive ends Robert Quinn and Da'Quan Bowers know that the former Tar Heel is the more explosive of the two pass rushers.
That fact is the primary reason why Quinn could leapfrog Bowers as the draft's top defensive end and potentially even the No. 1 pick in the draft.
There are two primary areas of concern with Quinn -- each of which he addressed in today's interview at the Combine.
The most important is his health.
As this excellent article by Andew Miller of the South Carolina Post and Courier explains, during his senior season in high school, Quinn underwent emergency surgery to deal with a brain tumor. The tumor, which was found to be benign, was causing Quinn headaches and even blackouts. It too close to Quinn's brain to be removed completely, so it remains a cause of concern for NFL teams.
Quinn, however, is not concerned. He takes a CT scan every six months now and finds himself "falling asleep" each inside the chamber when asked to do so. He also claims that he hasn't had a headache "since high school [following the surgery]," as well.
The other concern with Quinn, of course, is the fact that he, along with defensive tackle Marvin Austin and wide receiver Greg Little, was suspended for the entire 2010 season.
Scouts relayed to me that the UNC staff had told them Quinn was "supposed to be a very good kid" but some questioned whether the fact that Quinn is still viewed as a top prospect despite the suspension made him less concerned about the impact his suspension had on the Tar Heels' disappointing 2010 season.
Quinn seemed surprised when asked if he cared about his suspension.
"I definitely cared," he said. "Watching the whole season, especially when UNC played LSU and I went down to support them, seeing our guys run on to the field, in the middle of the game I was about in tears in the stands. I made a selfish mistake and couldn't be out there..."