1. Running back: The trade of Willis McGahee to Baltimore leaves Anthony Thomas and Shaud Williams as the only two backs of note on the roster. Though both provide quality depth, neither is considered a premier back.
2. Cornerback: Ideally, Ashton Youboty is ready to replace Nate Clements, who signed with San Francisco, as the starter opposite Terrence McGee. However, Youboty appeared in just three games last year and the Bills have to be prepared for the possibility he struggles. Nickel back Kiwaukee Thomas lacks the speed of a starter so Buffalo needs a corner who can provide the Bills with an insurance policy.