The 2017 NFL draft has not even begun yet, and the 2018 draft already is on the mind of many Jets fans.

“Suck for Sam” seems to be the battle cry of many Jets fans, who hope the team has a dismal season and lands the top pick next year to take USC’s Sam Darnold, who is projected to be the top quarterback.

Darnold is one of three quarterbacks who are considered top-10 talents in next year’s draft, along with Wyoming’s Josh Allen and UCLA’s Josh Rosen. Many draft pundits view those three as more talented than any of the quarterbacks in this year’s draft — which includes North Carolina’s Mitchell Trubisky, Clemson’s Deshaun Watson, Notre Dame’s DeShone Kizer and Texas Tech’s Patrick Mahomes II. That raises the question: Should the Jets avoid picking a quarterback this year with the hope that their franchise quarterback is waiting for them in 2018?

“You’re talking about three guys that you don’t know how they’ll pan out,” said Bill Polian, the former general manager of the Colts, who now serves as an ESPN analyst. “You don’t know what injuries are going to occur, et cetera, et cetera. I wouldn’t think a lot about it. This draft is what you ought to be focused on.”

The Jets seem destined for a dismal season in 2017 after clearing their roster of aging, overpriced veterans and having very little activity in free agency. Chances are they will be picking in the top five next year, but there is no guarantee.

“Yes, there are three quarterbacks a year away that project to be top-10 picks,” ESPN draft guru Todd McShay said, “but it is a dangerous game, and I’m not a big fan of sitting here today, if you have an opportunity and really like a quarterback, of passing because of next year. You never know where you’re going to be. You accidentally win five games and you wind up with the seventh pick and you can’t move up and those quarterbacks go 1, 2, 3. Now, what did you do?”

There also is no guarantee Darnold, Allen and Rosen will be viewed the same way after another season of football. Though Darnold is impressive, he has made just 10 starts. McShay said Allen might be the most physically gifted quarterback to enter the draft in five years, but he has been a starter for one year at Wyoming. Rosen is coming off season-ending shoulder surgery.

You don’t have to look back far to find cautionary tales of quarterbacks’ stock dropping in the year before they were drafted. In his “way too early 2016 mock draft” in May 2015, McShay had Christian Hackenberg going No. 1 overall, Connor Cook going No. 2 and Cardale Jones at No. 7. None of them were first-round picks. Tajh Boyd from Clemson was projected as the No. 2 pick in the 2014 draft entering the 2013 season. He ended up going to the Jets in the sixth round and never played a down. Darnold has the can’t-miss look. So did Matt Barkley and Matt Leinart at USC before their final years of college.

None of the trio of 2018 quarterbacks is even guaranteed to be in the draft. All of them are underclassmen who could go back to school in 2018. The Jets know how that feels all too well after Peyton Manning decided to go back to Tennessee in 1997, when the Jets had the No. 1-overall pick.

It seems like a recipe for disaster for coaches and GMs to think this way or to try to “tank” the season to get a better draft pick. Polian bristles at the idea that the Colts tanked in 2011 to draft Andrew Luck No. 1 overall in 2012, the so-called “Suck for Luck” campaign.

“Tanking is not in my vocabulary,” Polian said.

He pointed out the Colts won two of their final three games that year, including a win over the division-champion Texans.

“We tried to win every single game,” Polian said. “We were hamstrung by injury. We were hamstrung by failures at quarterback before Dan [Orlovsky] stepped in there. Everything went wrong that season, but I was really proud of the way our guys played throughout.”

What seems to be forgotten by people about the Colts’ 2-14 season in 2011 that led to getting Luck No. 1 overall is that it cost Polian and coach Jim Caldwell their jobs. Ryan Grigson, not Polian, got to pick Luck.

Former Buccaneers and Raiders coach Jon Gruden said the Jets can’t look ahead to next year.

“There is no guarantee you’re going to be able to get one of those names you’re talking about next year,” Gruden said. “There’s no guarantee some of those names will be as good as you think they are. There’s no guarantee that they’re coming out either. The best way to address the quarterback situation is to get one of these arms in your stable immediately and start the developmental process. That’s my opinion.”