Often for the Mets, the first six innings of a game tend not to matter. It’s not as if the Mets are bad early in games. (They’re not.) It’s just that from the seventh inning onward, they turn into a juggernaut.

Pete Alonso lofted the walk-off sacrifice fly Monday night for the New York Mets, who edged the Pittsburgh Pirates 4-3 in the opener of a three-game series.

Pete Alonso hit a game-winning sacrifice fly in the ninth inning and the New York Mets took advantage of a costly error by shortstop Isiah Kiner-Falefa to beat the Pittsburgh Pirates 4-3.