But if things are truly going south as the Jets approach the season's midpoint, they'll need to give Bryce Petty or Christian Hackenberg a look. And at this point, Petty is ahead of Hackenberg, at least based on the depth chart the Jets put out. That is a fair order, by the way — Petty ahead of Hackenberg.
Petty was better in the preseason. I would guess that sometime after the season's midpoint, the Jets will bench McCown. This assumes, of course, that he is able to stay healthy until then. He might not.