The Boston Red Sox survived a roller-coaster Monday night at Fenway Park, rallying from a three-run deficit to beat the Seattle Mariners 9-8 in 10 innings on August 31, 2026. Boston's offense clawed back against a Seattle bullpen that couldn't hold the lead, and Aroldis Chapman slammed the door in the top of the tenth to set up the walk-off finish. Trevor Story led the way with two hits and three RBI, while Ceddanne Rafaela matched that three-RBI output and Jarren Duran added a solo home run and two RBI of his own. It was a full-roster effort that the Fenway crowd will not forget quickly.

Red Sox 9, Mariners 8 (10 Innings): Full Box Score Highlights

Boston Offense Grinds Through Seattle Pitching

George Kirby lasted only five innings for Seattle, surrendering five earned runs on seven hits with two walks and just two strikeouts. Boston's lineup made him work, and the damage was real. Story went 2-for-5 with three RBI. Rafaela was 2-for-4 with three RBI. Duran went 1-for-4 with his home run and two runs batted in. Mickey Gasper chipped in a solo shot of his own, going 1-for-4. Nick Sogard added a pair of hits, and Roman Anthony reached twice in four at-bats to keep rallies alive throughout the night.

The comeback was not clean. Boston had to claw through Seattle's bullpen after Kirby departed, and Eduard Bazardo's shaky 0.1-inning relief appearance — three hits and two earned runs surrendered — cracked the door open for Boston late. Cooper Criswell got the loss after walking two and allowing the game-ending hit in the tenth.

Boston Pitching: A Bumpy Road to the Win

Starter Payton Tolle gave Boston 5.2 innings but allowed four earned runs on six hits, striking out six. The bullpen situation got messy quickly when Tyron Guerrero entered and was tagged for three earned runs on three hits and a walk in just one-third of an inning — the kind of outing that nearly let this game slip away entirely.

Erik Miller steadied things with a strikeout-filled inning, allowing one earned run. Alec Gamboa was the unsung bridge, delivering two scoreless innings on one hit with a strikeout. That set the table for Aroldis Chapman, who was perfect in the tenth — two strikeouts, no hits, no walks in a clean inning of work. Chapman earned the win.

Randy Arozarena Kept Seattle Alive

It would be incomplete to recap this game without crediting Randy Arozarena, who was a one-man wrecking crew for the Mariners. He went 4-for-5 with a home run and four RBI. Cal Raleigh added a solo shot, and Dominic Canzone went 2-for-5 with two RBI. Seattle put up eight runs and still lost — a credit to how relentlessly Boston's lineup kept answering back.

Turning Point: Boston's Late Rally Breaks Seattle's Back

The turning point came when Boston chipped away against Seattle's bullpen after trailing by three. Bazardo's brief and damaging appearance gave Boston the opening it needed, and the Red Sox did not waste it. Story and Rafaela delivered the key run-producing hits that brought Boston level, and once Chapman locked down the tenth, the walk-off opportunity materialized against Criswell.

Key Performers

  • Trevor Story: 2-for-5, 3 RBI
  • Ceddanne Rafaela: 2-for-4, 3 RBI
  • Jarren Duran: 1-for-4, 1 HR, 2 RBI
  • Mickey Gasper: 1-for-4, 1 HR, 1 RBI
  • Nick Sogard: 2-for-4
  • Roman Anthony: 2-for-4
  • Aroldis Chapman (W): 1.0 IP, 2 K, 0 ER
  • Alec Gamboa: 2.0 IP, 1 H, 0 ER

What's Next for the Red Sox

Boston continues its home stand at Fenway Park. After a win this dramatic — a three-run deficit erased, extra innings, a walk-off — the Red Sox will look to carry the momentum of a gutty performance into the next game. Seattle will look to regroup after squandering a multi-run lead against Boston's lineup.