It never ceases to amaze me how people look at ht, wt, 40 times and immediately feel like they know more than the people who are paid to evaluate talent.
Dennis may never make a 53 man roster, who knows. But having been around that kid for a lot of years I doubt anyone has more heart, or more to prove and that's a serious motivator. Any team that takes a chance on him will get more than they invest and a benefit to other players because of his attitude.
He was looked over as a senior at Fulton because he did have Harrison Smith's size or speed, yet he dominated every game he played in (ask Pearl-Cohn, Carter and Alcoa how dominate he was), and at UT it seemed each year he had to beat out the new guy and he did. Once on a team, you can't keep him off the field.