A couple examples:
Underrated: Dan Mozes, West Virginia
The NFL is so rigid when it comes to the sizes it looks for at certain positions, that this 6-2 1/2, 293-pound center is barely considered draftable despite being one of the nation's most respected linemen the past two years. West Virginia ran for more than 300 yards per game last year, and Mozes was right at the center of attack. How many times did we see Steve Slaton or Pat White bursting through huge, gaping holes right in the center of the field? Particularly in a zone-blocking scheme like the Mountaineers', everything starts with the center, and Mozes was one of the nation's best. It's hard to believe he's not worthy of a selection somewhere over the course of seven rounds.
Overrated: Chris Houston, Arkansas
He's this year's definitive workout wonder. Houston was a good, not great cornerback for the Razorbacks last season, excelling in some games (USC, Tennessee), struggling in others (South Carolina, Florida). But he ran a 4.32 at the combine, bench-pressed some ridiculous amount and now suddenly he's the second coming of Lito Sheppard -- or at least a solid first-rounder. Not buying it. Houston certainly talks a big game, but he still casts no shortage of doubt. Perhaps some teams are that desperate for a cornerback (because top prospects Leon Hall and Aaron Ross aren't exactly sure-locks, either).