everyteam has holes, but in the end the less weekness you have the harder it is for the oppostion to game plan and exploit .
The bills have a decent amout cap space, these players could be added a resonable cost and upgreade the roster to fit the new coaches schemes .
1 shaun phillips . they need a olb-de to play opposite Mario, at 32 his options may be limited. adding the 34 olb helps pettine when he wants to line up 34 base
2 James Casey : He probably will not come as a bargin but he shouldn't break the bank , lines up at full back and Tight end. Finding multiple postion players is always a plus
3 Brandon Moore : reading the tea leaves it seems levitre is gone , either his demands or off the charts or he doesn't profile correcty for the Bills. Moore is still a top notch run blocker and has a history with Marrone
4 Mike Devito : A beast against the run can play tackle in a 43 or end in a 34. Adds some grit the defense needs. A nice rotational d lineman
5 Devery Henderson : great insurance as a downfield threat if Graham continues with his growing pains
6 Even if Mckelvin is signed I would really like to add a vet corner back. I don't think Keenan Lewis will come cheap but I would kick the tires. Quintan Jammer might be more in line as a cheap stop gap.
The Bills still need a qb, and I am coming around to Smith , if he is there at 8 great if not best player available.
wide outs and inside backers are going to come from the draft. I guess you could add Bart Scott to the list but not sure what he has left .