I think he has more value as a low end starter or rotational player than he would in a trade situation. His contract is relatively cheap for next year, and we need bodies that know the defense, not just a bunch of rookies and new guys again.
He's a bridge until they get a better EDGE defender to go along with Hughes in the draft (along with some DTs).
Also, (as others said) who is going to want him based on his body of work so far?