BOSTON, MA—The Boston Red Sox today announced the following roster moves:

• Acquired right-handed pitcher Isaiah Campbell from the Seattle Mariners, in exchange for infielder Luis Urías.
• The club will not tender a 2024 contract to right-handed pitcher Wyatt Mills. As a result, Mills will become a free agent.
• Boston will tender 2024 contracts to all 29 remaining unsigned players on their Major League roster. Eight players are already under contract for 2024: Rafael Devers, Kenley Jansen, Chris Martin, Rob Refsnyder, Chris Sale, Trevor Story, Garrett Whitlock, and Masataka Yoshida.

The Red Sox’ 40-man roster is now at 37.

Campbell, 26, went 4-1 with one save, a 2.83 ERA (9 ER/28.2 IP), a .210 opponent batting average, and 33 strikeouts in 27 games for the Mariners during 2023, his Major League debut. The right-hander was one of eight rookies last season to make at least 25 appearances and post an ERA below 3.00. He owns a 2.01 ERA (20 ER/89.2 IP) in 61 career minor league games (four starts), including a 2.63 ERA (8 ER/24.0 IP) in 23 games for Double-A Arkansas in 2023. The Portugal native was selected by Seattle in Competitive Balance Round B of the 2019 First-Year Player Draft out of the University of Arkansas, where he earned a degree in criminal justice.

Urías, 26, was acquired from the Milwaukee Brewers on August 1, 2023 and played in 32 games for the Red Sox, batting .225 (20-for-89) with 13 runs scored, four doubles, two home runs, and 13 RBI. The right-handed hitter played in 52 Major League games overall during 2023, appearing in 39 at second base and 19 at third base. Originally signed as a non-drafted free agent by the San Diego Padres on December 27, 2013, the Mexico native has batted .234 (331-for-1,412) with 192 runs scored, 48 home runs, and 180 RBI in 445 games with San Diego (2018-19), Milwaukee (2020-23), and Boston (2023).

BOSTON RED SOX 40-MAN ROSTER (37)

Pitchers (22): Brayan Bello, Brennan Bernardino, Isaiah Campbell, Kutter Crawford, Wikelman Gonzalez, Tanner Houck, Joe Jacques, Kenley Jansen, Zack Kelly, Mauricio Llovera, Chris Martin, Bryan Mata, Chris Murphy, Luis Perales, Nick Pivetta, Nick Robertson, Chris Sale, John Schreiber, Brandon Walter, Zack Weiss, Garrett Whitlock, Josh Winckowski

Catchers (2): Reese McGuire, Connor Wong

Infielders (6): Triston Casas, Bobby Dalbec, Rafael Devers, David Hamilton, Trevor Story, Enmanuel Valdez

Outfielders (5): Wilyer Abreu, Jarren Duran, Rob Refsnyder, Alex Verdugo, Masataka Yoshida

Infielder/Outfielders (2): Ceddanne Rafaela, Pablo Reyes