In this situation and with this particular player, Derek Hagan, IMO is a scrub. Loveable or not, he's gone. He is Not NFL quality.
Derek Hagan contributed zero to a 6-10 team, if there is an advantage to him knowing anything of value, and for the jets to gameplan around is just not happening. He is a fringe player.
But, Jerry Rice in his first year with the Raiders after being with the 49ers for over a decade, probably could have some serious insights for a new team and coach.
I will sleep easy because if Hagan is signed, and plays against the Bills it will be to the Bills advantage. Not the jets.