Shut down again, Carrasco ETA now late July

Carlos Carrasco has been shut down for a week, in the hopes that a platelet-rich plasma injection in his torn right hamstring will allow him to strengthen the muscle and enable him to return to the Mets sooner rather than later.

Carrasco is now not expected back until late July, acting general manager Zack Scott said of the former Indians right-hander, who has yet to pitch this season. There are certain markers that Carrasco wasn’t able to reach before he could ramp up his activity, which is why they opted for the shot. In early May, Carrasco was believed to be close to starting a rehab assignment, but his hamstring was still not feeling right, The Post’s Mike Puma reported at the time.

“We hit kind of a plateau in terms of strength gains,” Scott said before the Mets topped the Padres, 3-2, at Citi Field.

Thirty minutes before Scott delivered the bad news on Carrasco, the Mets announced the addition of right-hander Nick Tropeano off waivers from the Giants.

The timing of the addition seemed fitting, since Carrasco getting shut down made it necessary for the first-place Mets to add someone capable of starting. Not only is Carrasco’s return uncertain, but Noah Syndergaard also is still a few weeks away from picking up a baseball again after an MRI exam revealed right elbow inflammation during his road back from Tommy John Surgery.

“Obviously, with some of the injuries we’ve had to guys like Noah and Carlos, they’re being out a little longer than we hoped initially, we wanted to make sure we had enough to cover us,” Scott said.

Tropeano, a 30-year-old Long Island native, was 1-0 with a 1.50 ERA out of the bullpen for the Giants this year before getting designated for assignment. He has made 39 starts among his 53 appearances across seven big league seasons.