Two prominent 2011 NFL Draft prospects are at the Buffalo Bills' Orchard Park headquarters today for pre-draft visits. The Bills have confirmed that Alabama defensive tackle Marcell Dareus and Purdue pass rusher Ryan Kerrigan were in the building this morning.

Dareus is a fan favorite possibility for the Bills with the No. 3 overall pick. A 3-4 defensive end at Alabama, Dareus is viewed as one of the draft's best and safest prospects this year, and could conceivably slide into the starting lineup at defensive end alongside nose tackle Kyle Williams and veteran end Dwan Edwards. He'd do a lot to help shore up the Bills' league-worst run defense.

Kerrigan, meanwhile, isn't considered a strong possibility at the top of the draft, but is a very intriguing prospect in his own right. Though he lacks elite physical tools, he's still an impressive athlete, and enters the draft as one of the most productive collegians available. In Buffalo, he'd likely be a trade-down target that would concentrate on rushing the passer - whether it be as a 3-4 outside linebacker or with his hand in the dirt as a 40-front defensive end, similar to the role Chris Kelsay played a year ago.