Top four struggling, Locker ascending

Updated: September 28, 2009, 2:14 PM ET
By Kevin Weidl
One of the biggest NFL draft storylines so far this season has been the struggles of the top four quarterback prospects, all of whom have raised questions about their ability to transition to the next level.

Oklahoma's Sam Bradford entered the season as Scouts Inc.'s the top-ranked NFL prospect and is not in danger of free-falling down the board, but Bradford's poise and durability have become big issues. He spent the 2008 season in a cocoon for the most part but in last season's biggest games and in one half against BYU it was as different story altogether.

Bradford faced all kinds of pressure last season against Texas and Florida, and also early in this year's season-opener, and he looked human. His accuracy and timing suffered and as he took more and more of a pounding in those games there did not seem to be extraordinary toughness there. Teams will wonder if he is fragile after the injury against BYU. Bradford has a chance to answer some of these questions if he comes back healthy at some point this season, but if not his NFL value will become very difficult to project.

Colt McCoy of Texas does a good job of moving his feet and creating plays in a shotgun-based system but most prove he can function at the same high level when under center. The play-action game is a huge part NFL offenses and scouts want to know how he will handle turning his back on defenses and then having to make quick reads on the safety and deliver the ball on time.

To check out other questions facing Bradford and McCoy, the rest of the struggling quarterbacks, the passer Kevin Weidl thinks could end up being the top 2010 prospect, and notes from around the country, you must be an ESPN Insider. Insider