An already thin Jets wide receiver corps might have gotten thinner Saturday night.

Quincy Enunwa, the team’s most experienced receiver, left the Green and White practice/scrimmage at MetLife Stadium with a neck injury. Jets coach Todd Bowles said he was not sure of the severity after the practice. Enunwa missed a minicamp in June with the same injury.

The injury occurred during 7-on-7 drills. Christian Hackenberg threw a slant pass to Enunwa in the front of the end zone. He went to the ground trying to make the catch and apparently hit his head on the ground. Enunwa got up and tried to take a step, but fell flat on his face in a scary moment.

“He fell,” Bowles said. “Nobody touched him. He hit his head or he hit his neck. Something went wrong when he fell.”

Doctors and trainers surrounded Enunwa, who looked like he had trouble moving his arm. It is possible he suffered a “stinger,” which is a nerve injury in the shoulder/neck area, though Bowles did not say that specifically.

The Jets are extremely young at wide receiver and can ill afford to lose Enunwa.

“We’ll see what happens first,” Bowles said. “If we have to lose him, we’ll adjust from there. We’ve got young guys coming on. We’ll see what the results are and go from there.”

The quarterbacks had a mixed night. Early on, they struggled to move the ball, going three-and-out on the first four series. But they turned things around as the night went on. Josh McCown threw two touchdown passes and Hackenberg added one.

“That’s what it’s all about,” Hackenberg said about turning things around. “Not everything is going to go to plan, especially in this league. You’ve got to be able to kind of dig deep and manufacture drives, yards, first downs, things like that. Being able to do that toward the end I thought was great as a unit.”

McCown went 8-of-13 passing for 114 yards and was sacked twice. He threw a 55-yard touchdown to Chris Harper and a 5-yarder to Austin Seferian-Jenkins. He also threw an interception that Marcus Maye returned for a 60-yard touchdown.

“Marcus made a heck of a play,” McCown said. “We’ve talked about these two young safeties for a while now. I think they’re gifted young players, special players, not just physically but just their approach, how they carry themselves. He made a heck of a play, hat’s off to him.”

Hackenberg completed three of five passes for 45 yards and was sacked three times. He threw a 25-yard touchdown to Jordan Leggett. It was a nice pass by Hackenberg, who was under pressure and stepped up to make the throw.

Bryce Petty went 4-for-12 for 45 yards.

On the first play of the night, the Jets brought 10-year-old Jesse Pallas onto the field and lined him up at tailback. Pallas, who is from Miller Place was diagnosed with ALL Leukemia in 2011 and suffered a relapse in 2014. He went into remission in the spring, but he still continues to suffer from serious medical conditions like bone loss and brain swelling.

Pallas ran for a 50-yard touchdown through the Jets defense and was given four tickets to the Jets season opener. The Jets were made aware of Pallas through The Marty Lyons Foundation.

Rookie CB Xavier Coleman suffered a leg injury that looked serious. … DE Leonard Williams had two sacks. … WR Bruce Ellington was waived with a failed physical designation a day after they claimed him from the 49ers. … The Jets signed FB Algernon Brown. … RB Bilal Powell was kept out as a precaution after taking a big hit Friday. RB Matt Forte (hamstring) and safety Jamal Adams (ankle) did not practice. Rookie WR Gabe Marks (hamstring) was held out.

Rookie safety Marcus Maye had the play of the night when he intercepted quarterback McCown and returned it 60 yards for a touchdown. Maye has had a very impressive training camp.

Cornerback Buster Skrine fell down and allowed a 55-yard touchdown pass from McCown to Chris Harper. Skrine may lose his grip on a starting role if he does not pick things up.

Leonard Williams continues to look like the best player on the field. He had two sacks Saturday night and looks even more explosive than last year. Williams could have a monster year.