Posted by Mike Florio on April 11, 2008, 3:09 p.m. There's no denying the impressive physique and workout numbers that have been posted by Ohio State defensive end/linebacker Vernon Gholston. But some league insiders are concerned that Gholston might be this year's Mike Mamula. Mamula, you might remember, was a defensive end who rocketed up the draft board based on incredible pre-draft numbers. The Boston College product made it all the way to No. 7 in 1995, jumping past guys like Joey Galloway and Warren Sapp and Hugh Douglas and Ty Law. But Mamula was a bust as a member of the Philadelphia Eagles, and he has long since been out of the league. As to Gholston, a league source tells us Gholston simply isn't memorable when watching game film. As the thinking goes, if he were a dominant player at the college level, he would be showing up in the thick of things on a continuous basis. Per the source, he simply doesn't. We've recently heard that the Raiders could be targeting Gholston with the No. 4 overall selection. But plenty of league insiders don't see him being a top-five selection.