Mitch Garver has been selected as the Seattle Mariners’ backup catcher, according to a source familiar with the team’s plans on March 22. The decision comes after Garver joined the Mariners on a Minor League deal as a non-roster invitee during spring training.
The move is significant for the team’s roster construction ahead of Opening Day. Garver competed against veteran Andrew Knizner for the role, with Knizner expected to be designated for assignment to clear space on the 40-man roster when final decisions are made. The official announcement may not come until Wednesday or even Thursday morning, when rosters are due.
Knizner signed a one-year, $1 million contract in December that is fully guaranteed. With more than five years of Major League service time, he can decline an outright assignment to Triple-A Tacoma if he clears waivers and would still receive his salary if another team claims him. In contrast, Garver will earn $2.25 million this season under his split Minors contract, which becomes fully guaranteed if he spends just one day in the majors in 2026.
Mariners manager Dan Wilson said before Seattle’s Cactus League win over the White Sox: “That’s been a spot that’s obviously made for a difficult decision too,” Wilson said. “But I think the driving factor is what makes us better. And I think Garv has had a great camp.”
Garver brings eight-plus years of experience and can also refuse any minor league assignment this season should circumstances change. Last year, he earned $12.5 million as part of his previous two-year free-agent deal but transitioned from designated hitter to backup catcher by midseason due to changes in team needs and performance.
The Mariners’ choice reflects both financial considerations and roster flexibility; combining salaries for both catchers amounts to less than what was paid last year solely for Garver’s services as DH and backup catcher combined. Team sources suggest that veteran experience and rapport with pitchers were key factors in retaining him.
Looking ahead, Seattle appears willing to absorb some sunk costs if it means assembling their preferred roster as they aim for success in what could be a competitive American League West race.
