Red Sox outfielder, veteran leader signs with Seattle after four-season run in Boston

After four seasons in which he emerged as a veteran leader and key bench player for the Red Sox, Rob Refsnyder’s time in Boston is over.

Refsnyder has signed a one-year contract with the Mariners, the club announced. According to a major league source, the deal will pay Refsnyder a base salary of $6.25 million in 2026. It also includes $250,000 in incentives.

Refsnyder, who turns 35 in May, was a journeyman utility player when he signed with the Red Sox as a minor league free agent in December 2021. Over the last four seasons, he found a home in Boston, where he mashed left-handed pitching and became an important clubhouse voice. Along with Trevor Story and Alex Bregman, Refsnyder helped form a core of older position players who helped the Sox navigate treacherous waters in the fallout of the Rafael Devers drama (and subsequent trade) over the summer. On the field, he was plenty productive, too, as he hit .269 with nine homers, 12 doubles and an .838 OPS in 70 games in his limited role in 2025.

In 309 games over the past four seasons, Refsnyder hit .276 with 27 homers, 119 RBIs, 48 doubles and an .804 OPS while serving as one of the best hitters in baseball against left-handed pitching. In 2025, he posted a .302 average, .560 slugging percentage and .959 OPS against southpaws, pairing with Romy Gonzalez to form a potent pair of right-handed platoon options for Alex Cora. Refsnyder’s .596 slugging percentage against left-handed starters was the fourth-best mark in baseball. Since the start of 2021, Refsnyder ranks third in the majors in on-base percentage against lefties (.405) among players with 300 plate appearances.

Refsnyder expressed strong interest in returning to the Red Sox in 2026 but in recent weeks, the writing has been on the wall for his departure. There aren’t many at-bats to go around in Boston’s crowded outfield/designated hitter picture and recent comments from manager Alex Cora made it harder to see Refsnyder returning in his role. Specifically, the club wants Wilyer Abreu — a platoon player to this point in his career — to get regular starts against lefties in right field, a position where Refsnyder logged 21 starts in 2025. Cora also praised the athleticism of Nate Eaton, who may take over Refsnyder’s role as a versatile, younger and cheaper version in 2026. Eaton had a .673 OPS against lefties in 49 big league plate appearances last year but the Red Sox think there’s more in his right-handed bat. Kristian Campbell is expected to focus on outfield work in spring training, too, further crowding a group that includes Abreu, Roman Anthony, Ceddanne Rafaela, Jarren Duran and potentially Eaton and others.

Chief baseball officer Craig Breslow said Monday he wants to extend the runway for both Abreu and Duran against left-handed pitchers.

“We believe both of those guys are supremely talented,” Breslow said. “They’ve handled opposite-handed pitching pretty well.

“Guys reach a certain point in their career where they’ve kind of earned the right to play every day or to be in the lineup more against left-handed pitching. I think both of those guys are at that stage.”

The Mariners will be Refsnyder’s seventh major league team, joining the Yankees, Blue Jays, Rays and Twins. He had previously signed two deals to remain in Boston, agreeing to avoid arbitration at $1.2 million for 2023, then signing a $1.85 million extension for the 2024 season that included a $2 million option for 2025.

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