3. Mays' 40 time: Mays' 40-yard dash time could be a huge story. It's hard to believe he has something to prove, but he does. A year ago, many considered Mays a top-five pick, but he elected to stay at USC for his senior season. Now, he's considered the second-best free safety in the draft behind Berry. If Mays runs a sub-4.4 40, he could jump back into the top 10 overall, but he's currently expected to be drafted in the middle of the first round. Physically, Mays is a freak. He's 6-foot-3, 231 pounds, and a sub-4.4 40 could be huge in improving his stock. Berry is considered a top-three pick because of his playmaking ability and is expected to establish himself immediately among the top safeties in the NFL.

A great safety with mobility and playmaking ability is vital in this day and age, as teams routinely face quarterbacks throwing from three- and four-receiver sets. Too often, defenses with average coverage at the safety position get carved up by good quarterbacks. Mays needs a fluid workout and a great 40 time to come closer to the perceptions scouts had of him in 2009.