The Dark Knight is dropping the curtain on his baseball career.

Matt Harvey, who rose to superhero heights with the Mets early in his career before the bright lights faded, announced Friday in an Instagram post that he is retiring from the game.

Harvey’s emotional farewell post featured a photo of the right-hander in a Mets uniform from his magical 2013 season.

“A game I will always remember,” Harvey wrote about April 19, 2013 when he hurled seven innings in a 7-1 win over the Washington Nationals at Citi Field opposite Stephen Strasburg.

“I haven’t gone back to really feel or relive some of the highest moments pitching in the big league, especially for the New York Mets. But this particular game hits me extremely hard, making this a difficult thing to write.

“I pitched to win,” Harvey, who has not pitched in the big leagues since the 2021 season with the Baltimore Orioles, wrote in his social media post. “To fire up my team and more importantly, to fire up the fans in a city that I’ve always loved.”

“It is one of those feelings you know will never go away. It’s something that will last forever. …”

“That day will forever stay in my dreams. I know I pitched well and we were on our way to a win, and as I’m sitting in the dugout, all I hear is the chants overtaking Citi Field.

“Harvey’s Better.”

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