The Bills continued to get work done before the holiday, clicking through their draft class signings.
The latest is fifth-round offensive lineman Cyril Richardson.
The 6-foot-5, 343-pound Richardson won the Jim Parker award as the best offensive lineman in the country last year at Baylor.
They only have two unsigned picks left, first-rounder Sammy Watkins and second-rounder Cyrus Kouandjio.