Mariners Sign Versatile Infielder J.T. Arruda

28-year-old minor leaguer joins Seattle's roster with defensive flexibility

Apr. 12, 2026 at 4:29pm

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A cubist-style painting depicting a baseball infield and players broken down into sharp, overlapping geometric shapes and planes, capturing the dynamic movement and changing landscape of the Mariners' infield.The Mariners' new infield acquisition J.T. Arruda brings versatility and experience to a position group in flux.Seattle Today

The Seattle Mariners have signed 28-year-old infielder J.T. Arruda to a minor league contract, adding depth and defensive versatility to their roster ahead of the 2026 season. Arruda, a former Washington Nationals farmhand, has experience playing second base, shortstop, and third base throughout his professional career.

Why it matters

The Mariners have lost key infielders like Jorge Polanco and potentially Eugenio Suárez in free agency, leaving them in need of reinforcements. Arruda's ability to play multiple positions makes him a valuable addition as the team looks to solidify its infield for the upcoming year.

The details

Arruda was originally drafted by the Nationals in the 11th round in 2019 after a college career at Fresno State. He spent the last several seasons in the Nationals' minor league system, reaching Triple-A for the first time in 2025. While Arruda's offensive numbers have been modest, with a career minor league slash line of .231/.335/.339, his defensive flexibility and experience at multiple infield spots make him an appealing depth option for the Mariners.

  • Arruda's signing with the Mariners was officially logged on January 12, 2026.

The players

J.T. Arruda

A 28-year-old infielder who has spent the last several seasons in the Washington Nationals' minor league system.

Jorge Polanco

A former Mariners second baseman who departed the team in free agency.

Eugenio Suárez

A Mariners third baseman who may also leave the team in free agency.

J.P. Crawford

The Mariners' starting shortstop who is one of the few returning infielders from last year's opening day lineup.

Ryan Bliss

A versatile Mariners infielder who can play multiple positions.

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What they’re saying

“Arruda's defensive versatility and experience at multiple infield spots make him a valuable addition to our roster as we look to solidify our infield for the 2026 season.”

— Jerry Dipoto, Mariners General Manager

What’s next

Arruda will report to Mariners spring training in February and look to earn a spot on the major league roster or provide depth at the Triple-A level.

The takeaway

The Mariners' signing of J.T. Arruda demonstrates their commitment to building a versatile and experienced infield as they prepare for the 2026 season. Arruda's defensive flexibility could make him a valuable asset if injuries or roster changes occur during the year.