ATLANTA (Interstat) — Mike Yastrzemski delivered a walk-off double in the 10th inning to score automatic runner Ha-Seong Kim, lifting the major league-best Atlanta Braves to a 3-2 victory over the Boston Red Sox on Friday night at Truist Park.

Yastrzemski’s sharp line drive to left field off Red Sox rookie Tyler Samaniego brought Kim home from second base, ending a taut extra-inning contest that featured strong pitching from both sides. Didier Fuentes worked the top of the 10th for Atlanta, allowing a single and a hit-by-pitch before inducing a lineout from Mickey Gasper to shortstop to strand two runners and earn his third win against no losses.

Samaniego, who took the loss and fell to 0-2, entered for the bottom of the 10th after the Red Sox failed to score in their half. Kim, the automatic runner, moved to third on a groundout and scored on Yastrzemski’s double. Atlanta improved to 31-14, while Boston dropped to 18-26 and lost for the fourth time in five games. The Red Sox have not scored more than three runs in any contest during that stretch.

The game featured a pitchers’ duel that lived up to its billing. Atlanta starter Spencer Strider, the top star for the Braves, allowed three hits and one earned run over 5 1/3 innings, striking out four and walking two. The right-hander, coming off two wins in his previous starts, kept Boston’s lineup off balance early. Boston starter Connelly Early matched him, yielding five hits and two earned runs in five innings while striking out six.

Atlanta struck first in the bottom of the first inning. Drake Baldwin launched a 12th homer of the season to center field, a solo shot that gave the Braves a 1-0 lead. The designated hitter-catcher finished 2 for 4 with the homer and an RBI, providing the early offense.

Boston tied the score in the top of the fourth, but the Braves answered immediately. Michael Harris II led off the bottom of the fourth with his eighth homer, a line drive to center field, restoring Atlanta’s lead at 2-1.

The Red Sox evened the game again in the sixth. Carlos Narváez doubled to left field, and Gasper followed with a run-scoring single to left, knotting the score at 2-2. Boston took its first lead in the seventh when Marcelo Mayer hit a solo homer to right-center field, his second of the season. That proved to be the only other run for Boston, as the Braves bullpen stifled any further threats.

Atlanta’s relief corps was sharp. Robert Suarez tossed 1 1/3 scoreless innings with one strikeout. Dylan Lee faced one batter and struck him out. Raisel Iglesias worked a scoreless ninth, allowing one hit and fanning two. Fuentes closed it out with a perfect inning of his own.

Boston’s bullpen also performed well. Jovani Morán gave up one hit over 1 2/3 innings, striking out three. Aroldis Chapman threw a clean eighth with two strikeouts. Greg Weissert allowed no hits in 1 1/3 innings of relief. Samaniego’s lone inning was the decisive one.

Both teams managed seven hits apiece. Boston’s hits included doubles from Ceddanne Rafaela, Andruw Monasterio, and Narváez, plus Mayer’s homer. Atlanta’s hits were spread among Baldwin, Harris, Austin Riley, Sandy León, and José Azócar. The game, which ended in 2 hours 50 minutes, drew an announced crowd of 39,288.

Boston’s offensive struggles continued a pattern that has seen them score three runs or fewer in four of their past five games. The Red Sox have lost 15 of their last 18 road contests and are 4-12 in May. Atlanta, meanwhile, has won three of its last four and holds the best record in the majors.

The series continues Saturday with the same teams at Truist Park. Boston then travels to Kansas City for three games before returning home to face Minnesota. Atlanta heads to Miami for a four-game set after this weekend, then hosts Washington.

Interstat’s game simulator had projected a final score of Atlanta 7, Boston 5. The ELO system gave Atlanta a 58.50 percent probability to win. Atlanta was installed as a pregame favorite with a spread of -1.5. The total of five runs surpassed the over/under line of 8.5.