The latest -- and the Mets hope last -- Matt Harvey plan is official. For the regular season, anyway.

Harvey will start Sunday night's game against the Yankees in what manager Terry Collins said will be a shortened outing, though not a short as some have predicted.

"We don't know how short," Collins said. "I'm hearing some reports that are not true. We're going to keep a very close eye on him. We have to be cognizant of the fact we are looking at innings situations."

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Harvey has thrown 1711/3 innings in his first season back from Tommy John surgery.

Harvey will then make one more start after Sunday and also be available to pitch in the final weekend of the regular season against the Nationals if it matters in the standings or if the Mets feel he needs another tuneup to get ready for the postseason. Since Sept. 3, Harvey has thrown 51/3 innings. The Mets have managed the thorny situation as best they can since it exploded over Labor Day weekend.

"It's a huge challenge," Collins said. "You realize there's an innings limit. You realize he's close. He is going to pitch if we get to postseason . . . No one has any answers because I think this is something that's been pretty strange to happen this time of year to your starting rotation. But we've had to deal with it."

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Long Island lefty Steven Matz will open the series against the Yankees on Friday. Noah Syndergaard pitches on Saturday.

Trainer's room

Dario Alvarez, whom the Mets were taking a look at as a situation lefthander, had an MRI on Wednesday after suffering a left groin injury on Tuesday. The results were not available. "He's not moving around very good," Collins said.