If he sat on his couch the rest of the season, he’d still get a chance from some team in training camp next season. He would not get that chance if he’s rehabilitating an ACL.
If he signed with the Pats today and rushed for 120 yards Monday night, do you think he’s guaranteed himself a roster spot with the Pats or another team in 2019? Of course not. It might not even guarantee him a spot on the Pats roster when Burkhead comes off IR in a few weeks. Why take the risk then?
I’m glad you’re not an agent, Andy. You’d be advising your clients to do whatever Belichick says because not only does he ALWAYS have what’s best for the Patriots in mind, he does for every player as well.