Probably trying to save his job. It’s fair for the jets to get rid of him. There is a chance he’ll just get re injured and jets will never recoup their investment. Therefore he may be trying to to play to show he’s still in it. None of it makes any sense.
I was thinking about this earlier. if the Jets are in position to win out from that point and make the playoffs, that's technically a reason to rush back.
personally, I think he wants to do it to do it. it's the competitive side of him, or maybe just ego. but nobody else can say their ACL snapped during the regular season, and they made it back to play before the regular season is over. he wants to do it to show how amazing he is, simply put.