Preston is replaceable, but the issue is that he is not easily replaceable. Look at FA and find me a guy of his caliber that can slide right into this defence. Nope. Can you guarantee that the Bills can acquire a better, if not at least equal, talent at MLB through the draft? Nope. This is why they want him back and I can't agree more. The $4 million value seems good, but I imagine that the leading tackler in the league last year is looking at closer to $6million.