NEW YORK, June 15 -- Juan Soto stood at second base, helmet in hand, watching a run get taken off the board. He had just turned on a pitch and sent it over the right-field wall to lead off the ninth, the kind of swing that flips a one-run game and wakes up a sleepwalking crowd. Then the umpires put on the headsets. A fan had reached into the field of play, the replay officials in New York ruled, and the home run became a ground-rule double. The tying run that should have been standing on first never existed.

That was the moment Saturday's game turned, or rather the moment it stopped turning. The Atlanta Braves beat the New York Mets 3-1 at Citi Field, and the score will read like a tidy pitcher's duel in the morning box scores. It was no...