Mets fan knocks out Braves supporter in fight during game at Citi Field

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The New York Mets and Atlanta Braves’ National League East rivalry was carried on off the field as fans brawled with each other on Saturday night.

The fight occurred in the seats down the first-base line. Video posted on Twitter showed a man in a Braves jersey swinging over a Citi Field security guard trying to punch two other men in Jacob deGrom jerseys.

After the Braves fan failed to really connect on a punch, one of the Mets fans came back swinging and appeared to knock out the man. One person could be heard yelling, "F--- him up!"

A New York Mets baseball cap on the stairs of the dugout before the game against the Washington Nationals at Nationals Park, May 10, 2022, in Washington, D.C. (G Fiume/Getty Images)

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It’s unclear what started the brouhaha.

The Mets beat the Braves in both games of their doubleheader on Saturday.

New York Mets' Francisco Lindor watches the ball after hitting an RBI double in the sixth inning of the first game of a doubleheader against the Atlanta Braves, Aug. 6, 2022, in New York. (AP Photo/Mary Altaffer)

Max Scherzer struck out 11 batters in the second game of the doubleheader to lead New York to a 6-2 victory in the evening game. In the afternoon game, Francisco Lindor added three RBIs and the Mets won the game, 8-5.

"They’re a great team, great lineup," Scherzer said of the Braves. "For us to show up and bring the energy and go out there and beat them, that’s great. It’s great to get these wins, but it’s not over yet. We know how good they can play, and they can get hot."

New York Mets starting pitcher Max Scherzer (21) high-fives