Isiah Kiner-Falefa took a lead off third base and kept edging his way toward home. When no Met even attempted to slow him, the Yankees super utilityman did what no Yankee had done in nearly seven years.

Kiner-Falefa stole home Wednesday in a wild seventh inning of an eventual 4-3, 10-inning loss to the Mets at Citi Field, the first Yankee to do so since Didi Gregorius in August 2016 against the Orioles.

On third base with the Yankees up one, Kiner-Falefa wanted to pester Mets lefty Brooks Raley. He took a step. And another one. And another one. Mets third baseman Eduardo Escobar did not deke toward third base.

“I couldn’t believe it,” Kiner Falefa said. “When I play third base, if someone does that, I give them a little jab or something to at least force them back or maybe respect it.”

Kiner-Falefa kept walking down the line, hoping, maybe, he could force a balk. But then he was halfway home. Raley entered a full windup.

“I kind of timed it up,” said Kiner-Falefa, who said he had never stolen home at any level before. “I timed it up. Right before he made a move, I already committed. The timing just worked out perfectly. My instincts just took over.”

Kiner-Falefa took off. Raley delivered a high pitch that went to the backstop, and Kiner-Falefa slid in safely for a 3-1 Yankees lead that would not last.

Even before the steal of home, Kiner-Falefa’s speed had annoyed the Mets. When he stepped up to bat in the inning, the game was tied, and the Yankees had Josh Donaldson on second and Anthony Rizzo on first with one out.

Kiner-Falefa grounded to shortstop Francisco Lindor, who flipped to Jeff McNeil for one out. McNeil did not have a chance to get Kiner-Falefa at first but tried anyway. His throw to first was wide of Mark Vientos, who tried to keep his foot on the base while diving for the ball. It glanced off his glove and toward the Mets’ dugout, which enabled Donaldson to score the go-ahead run on the throwing error.

But the Mets mistakes were only just beginning. With Billy McKinney up, Kiner-Falefa took off for second base. Francisco Alvarez bounced the throw into center field, which allowed Kiner-Falefa to keep running to third.

He wouldn’t last at third long.

“I couldn’t believe I did that in the big leagues,” Kiner-Falefa said.