Left-hander Marco Gonzalez (3-1) took the loss, lasting just 1 2/3 innings. He gave up eight runs on eight hits and two walks.
The Red Sox took a 9-0 lead after two innings, sending eight batters to the plate in the first inning and 10 in the second.
In the first, consecutive one-out singles by Turner, Rob Refsnyder and Devers scored a run, with Reyes’ two-out double adding two more.
In the second, Turner’s two-run homer, his fifth homer of the season, scored Alex Verdugo to start the scoring. Refsnyder walked before consecutive two-out singles by Masataka Yoshida and Hernández and another two-run double from Reyes with Jarren Duran’s single scoring Reyes.
Boston added three in the fifth when Turner and Refsnyder singled, with Devers’ double scoring Turner. Yoshida’s groundout and Hernández’s sacrifice fly completed the scoring.
“We knew coming into this series they had a really good offense and we needed to pitch well,” Seattle manager Scott Servais said. “We just didn’t execute pitches. You look up and they got big numbers on the board and it’s tough to come back when you get that far down. We just didn’t execute or do what we needed to do on the mound early in the ballgame to give us a chance.”
The Mariners scored a run in the fourth when Cal Raleigh led off with Seattle’s first hit of the game, a ground-rule double, and scored on Jose Caballero’s two-out single. They added two more in the sixth when Caballero and pinch-hitter Sam Haggerty worked back-to-back one-out walks off right-hander Joely Rodriguez.
Ty France’s single loaded the bases, extending his hitting streak to a career-best 14 games. Julio Rodriquez hit into a fielder’s choice with a throwing error by second baseman Reyes combining to allow Caballero and Haggerty to score.
Seattle’s J.P. Crawford extended his on-base streak to 14 games when he was hit by a pitch in the third inning.
UP NEXT
After an off day Thursday, Seattle RHP Bryce Miller (2-0, 0.47 ERA) is scheduled to face the Braves in Atlanta on Friday.