Cam Schlittler is a real New Yorker now.

The Yankees’ promising young right-hander not only took in the Knicks’ season-opening win at MSG on Wednesday night, but the Boston-area native had a Bronx-style message for his hometown.

A fan getting an autograph from Schlittler while outside MSG in his car said, “F–k Boston” — and the pitcher enthusiastically responded, “Yeah, f–k Boston.”

The exchange was caught on video by a friend of the fan and quickly spread across social media.

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Schlittler’s Boston ties — he grew up in the suburb of Walpole, Mass. — became a storyline during the Yankees’ wild-card triumph over the Red Sox.

In the deciding game, the 24-year-old threw eight brilliant innings, striking out

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