New York Mets ace Noah Syndergaard will make a guest appearance next Monday on Long Island’s own prime-time sitcom, “Kevin Can Wait.”

The Mets first posted on Tumblr the unusual casting news Monday afternoon, with this line: “Noah Syndergaard might need a SAG card after his weekend. The ace filmed an upcoming episode of Kevin Can Wait featuring super Mets fan, Kevin James.”

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The Tumblr post was accompanied by pictures of Syndergaard on the set dressed as — one can logically assume — Thor.

In the series — taped at Gold Coast Studios in Bethpage — James’ character, Kevin Gable, is a huge Mets fan, and James is as well.

Meanwhile, Billy Joel told Newsday’s Glenn Gamboa that he will “definitely” appear on the CBS show this season. “I don’t know where, I don’t know when,” Joel said. When told that James has said he has been “begging” him to do the show, Joel observed: “But he doesn’t have to beg me. He’s a good guy. We’ll definitely do something for him.”

A CBS spokeswoman said that the episode has not yet been taped.