The Jets’ offense has looked like it did not belong in the Big Ten East in its past two games, never mind the AFC East.

But the Jets hope things are changing this week with the return of Sam Darnold against the Cowboys on Sunday. The 22-year-old quarterback has missed the past three games as he battled mononucleosis. Now he’s back and ready to lift the offense, which is currently ranked dead-last in the NFL.

Darnold practiced last week before the game against the Eagles, but the doctors did not clear him to play. He finally got the green light Tuesday.

“I think having a couple weeks of practices under my belt is a good thing,” Darnold said. “It’s definitely going to help with that, but there’s nothing like Sunday, and I think going out there and playing the first couple series, I think will be a little bit of a shock to the system, I guess you could say. But I think I’m going to be ready and hopefully, after those couple series, I think, I’ll feel right at home.”

The team and head coach Adam Gase desperately need a lift from Darnold. The Jets are 0-4 and have two more tough games with the 3-2 Cowboys on Sunday and the 6-0 Patriots next Monday night. Things are getting late early for the Jets.

This has been an awful slump. Dating back to last year, the team has lost its past seven games, its past seven home games and 13 of the past 14. The last time the Jets won at MetLife Stadium was almost exactly a year ago when they beat the Colts on Oct. 14, 2018.

“You are trying to get to the fourth quarter and be like, ‘All right, here’s our chance, here’s our opportunity,’ ” Gase said. “We missed out on one early in the season. The last three games we haven’t put ourselves in position to even get one, so it’s all about putting ourselves in position and figuring out a way to win in the fourth quarter.”

This will not be an easy challenge. The Cowboys have the No. 1 offense in the NFL and need a win themselves after suffering two straight losses.

Sam is back, but will it be enough?