The clock is ticking on Josh McCown.

Another Jets season is on the brink of slipping away, which means that McCown’s grip on the starting quarterback job is slipping away with it.

There will be calls for Todd Bowles to find out once and for all about Christian Hackenberg, and to a lesser degree, about Bryce Petty, should the Jets lose to the upstart Bills on Thursday night and fall to 3-6.

If it were up to Bowles, whose future is a mist, he would stick with McCown from here to eternity. Why? Because he knows McCown gives the Jets the best chance to win, and gives himself at least a puncher’s chance to save his job.

But at some point, of course, it won’t be up to Bowles.

It will be an organizational decision, necessitated by an eleventh-hour need to reach a final verdict on Hackenberg, GM Mike Maccagnan’s ill-fated 2016 second-round draft choice.

And Bowles, the good-soldier company man, will grin and bear it when that time arrives.

The $6 Million Question — this bridge quarterback toll — is when does the present give way to the future and McCown gets a pat on the back and the Jets are dispatched into a tank on the road to the 2018 draft?

Not so fast.

Not just yet.

Of course, there are some who wonder why McCown was not the backup from the start of the season, screaming “Start Hackenberg!”

Given how desperate the franchise is to find its franchise quarterback — Maccagnan did not try to trade up for Jameis Winston or Marcus Mariota in 2015 or draft Deshaun Watson this spring — finding out whether Hackenberg could be The Guy was the top priority.

Hackenberg was given a golden opportunity to win the starting job over the summer, and wound up with the bronze medal instead.

Hackenberg wouldn’t only have been thrown to the wolves, he would have been eaten alive, and the Jets would be 0-8 right now and racing the Browns to Sam Darnold & Co.