Would you consider Ray Lewis, AJ Hawk or James Farrior great in coverage? Pos needs to be covered up and playing the Will (or Mac, the WILB), since he tends to play with his pads too high. What you really want is someone that has great instincts and great range. I don't think that guy is Pos, and given Buddy Nix comments about the ILB position, he might not either. (The Bills apparently use the terminology of Sam, Mike, Will, Jack.)