Mets rookie Jefry Yan celebrated a strikeout too soon. Two pitches later, the celebration was earned.

A relief pitcher who launches into his strikeout celebration before the umpire signals the third strike is said to have jumped the gun. Jumped the gun means the celebration came before the official call. That is what happened Saturday at Citi Field when New York Mets rookie Jefry Yan, 29, went airborne in his signature acrobatic pose before the home plate umpire ruled his fastball to Washington Nationals infielder Nasim Nuñez a ball, not a third strike.

The count was 0-2, meaning Nuñez already had two strikes against him and no balls, with two outs in the top of the ninth inning. Yan thought his fastball caught the outside corner. He was airborne before the umpire decided otherwise.

What Yan did next was tap the top of his hat. That gesture triggers an ABS review. ABS stands for Automated Ball-Strike system, a technology using cameras and sensors to determine whether a pitch passed through the strike zone; a player initiates one by touching their cap to contest the call. The review sided with the umpire. Ball stood.

SNY play-by-play voice Gary Cohen, the longtime Mets broadcaster, kept it brief on air: "Now, that was funny."

Two pitches later, Yan got Nuñez to swing through a slider. Strike three, official this time. The acrobatic celebration ran its course, and the crowd had earned reason to cheer.

What the bottom of the ninth looked like

The Mets were a run down heading into their final at-bat. Brett Baty opened with a walk. Jorge Polanco singled, putting the potential winning run on base. Francisco Alvarez doubled to left, scoring Baty to tie the game and moving the winning run to third.

Francisco Lindor ended it with a single. That is a walk-off: the home team scores the deciding run in their final at-bat and the opponent never gets another chance. Lindor's hit gave the Mets the game and gave Yan his first major-league win.

Yan pitched 1.2 scoreless innings and struck out three hitters in the outing. He has appeared five times for the Mets since his call-up, after the season began in the minors, where his strikeout celebration first found a following. His ERA, earned run average (runs allowed per nine innings), stands at 1.80.

Speaking through a translator, Yan said he felt welcome in his Citi Field debut. The 1.80 ERA is the more durable evidence of that.