I'd keep him, but only with back half of top 10 tackle money. He's been injured and played poorly for 2 yrs in a row, no need to overpay for that no matter what the pro bowl voters think.
Well, in a league that's commonly referred to as "a business," you gotta believe players with expiring contracts who are on a team that has no chance to win a Super Bowl are going to think about their future to at least some degree. I mean the "business" works both ways, for the teams and the players. The players are running the "business" known as their own body. That's what any future paycheck of theirs is based on.