The game stretched to extra innings before Mike Yastrzemski settled it with one swing. His double to left in the 10th brought home Ha-Seong Kim and gave Atlanta a 3-2 victory over Boston at Truist Park.
Spencer Strider anchored the Braves' effort with 5.1 innings of one-run ball. The right-hander allowed 3 hits and struck out 4 while walking 3, carrying a 2.45 ERA. His counterpart Connelly Early matched him through five innings, surrendering 2 runs on 5 hits with 6 strikeouts and no walks.
Atlanta built an early cushion on solo homers from Drake Baldwin and Michael Harris. Baldwin opened the scoring in the first with a 407-foot blast to center. Harris extended the lead to 2-0 in the fourth, driving his shot 419 feet to center field. Boston answered with Mickey Gasper's RBI single in the sixth that scored Narváez, then Marcelo Mayer tied it in the seventh with a 378-foot homer to right center.
Tyler Samaniego took the loss for Boston, allowing the walk-off hit without recording an out. The reliever entered the 10th with a 1.17 ERA but couldn't escape the inning, falling to 0-2 on the season.
Atlanta snapped a one-game losing streak to improve to 30-14, maintaining first place in the division. Boston fell to 18-25 and remains in fifth place after dropping its second straight game.