Mets reliever sets baseball world on fire with the cockiest strikeout celebration in MLB history

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You play, and then cover baseball long enough, you think you've seen it all. I've been in this game a long time.

Hand up, I thought I'd pretty much seen it all ...

... Until New York Mets reliever Jefry Yan made his MLB debut Wednesday night. I can promise you, nothing will prepare you for this.

Whatever you're envisioning in your mind, it won't come close to what actually transpired on the field.

Jefry Yan of the New York Mets prepares to pitch in the sixth inning during his Major League debut against the Cleveland Guardians at Progressive Field in Cleveland, Ohio, on Aug. 5, 2026. (Getty Images)

Yan, 29, came on in the sixth inning for the first time since being called up earlier this week. The Dominican then proceeded to strike out the first batter he faced, and celebrated with his signature "jump in the air and then smack the ground" celebration that instantly set the baseball world on fire.

Take a look:

Whoaaaaaaaaa Nellie! I've never seen anything like it. Neither have you. Nobody has.

Because, frankly, nobody in their right mind would ever do that in public, much less in an actual Major League Baseball game.

But credit to Yan for not backing down. Some thought he would ditch the celebration when he finally got the call to the bigs, but he stuck with it.

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Dance with the partner you came with, right? Be you, no matter how insufferably obnoxious you are.

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Jefry Yan of the New York Mets celebrates after striking out Angel Martínez of the Cleveland Guardians for his first career