Dvoracek may emerge as sleeper

NFL draft prospects are commonly discussed in the same manner as financial portfolios, with their stock rising or falling. Sticking with that theme, each draft class has a handful of prospects who represent penny stocks. These are the risky investments that can be bought cheap and have tremendous growth potential.

The following is a breakdown of five prospects who will slip on draft weekend due to concerns regarding their character, durability, mental capacity or underachieving performance in college. But for teams willing to take a chance, these prospects could yield high returns.

Jason Allen, DS, Tennessee
Allen possesses an impressive combination of size, speed and athletic ability. He also has a solid work ethic and good character. He's a versatile defensive back (DC/FS) who was considered a first-round talent prior to suffering a season-ending hip injury five games into his senior year. The injury is likely to cause a significant dip in Allen's draft value, but if doctors project little long-term repercussions, I would take a flier on him as early as the second round.