With Shawne Merriman on injured reserve there’s a viable candidate with knowledge of Buffalo’s defensive system currently available.
Former undrafted free agent signing Antonio Coleman is available to be signed to the Bills active roster. After being one of Buffalo’s final cuts this past summer, Coleman hooked on with the New York Giants where he’s currently a member of their practice squad.
Practice squad players however, are free to sign with any NFL club at any time so long as it is an active roster assignment. Knowing Coleman’s familiarity with Buffalo’s system, its players and coaching staff it wouldn’t be surprising if the Bills pursue him to fill the void left by Merriman.
Personally I thought Coleman had a strong preseason this past summer with eight tackles and a sack.