So I took Pro football Reference, Approximate Value for a career, - I only picked players with 5 or more Buffalo seasons, and the top three CB's using that rubric are Butch Byrd [Career AV 11}, Robert James [Career AV 9], and Tre White [Career AV 8.9]. After that long drop off to the next 3, Nate Odomes, Mario Clark & Nate Clements. FWIW. - Deion is the highest graded NFL CB of all time, Career AV of 15.