Can Bills secure a top OT via draft?

When ESPN NFL Insider Mel Kiper Jr. released his list of the top 100 NFL draft prospects last week, he ranked the top tackles in this order: Auburn's Greg Robinson (4th overall), Michigan's Taylor Lewan (5th), Texas A&M's Jake Matthews (7th), Notre Dame's Zack Martin (10th). Lewan's stock has continued to rise in recent weeks to the point that he has leapfrogged Matthews and could even go ahead of Robinson.