let him walk then. He isn't the best CB in the league. Personally I think he is just a good CB, he got torched by Hopkins (which yes, many CBs do). But I don't find him to be special because he happens to be in the right place for an INT quite often. If he wants 15 million lets say, Id rather sign two good quality FA CB's and pay them 7 million each.
Cornell Armstrong didn't look so bad by the way. He was always on the receiver.