Jazz Chisholm Jr. swings big, a violent but smooth cut that has him wondering how many home runs he can destroy given a full season to take advantage of the short porch in right field in The Bronx.

He smiles big, a boyish grin habitually stretching on his face in a sport that isn’t known for smiles. He was beaming last October during the Yankees’ playoff run in Kansas City, where he felt the boos of an entire fan base and happily brushed them off.

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He talks big, on the field or while playing video games — and he has the kind of big personality that helped him onto the cover of one of those video games. In a modern-day baseball rarity, his fame may have outpaced his performance when he was tabbed to be the face of “MLB The Show 23.”

So of course his origin story is big, too.