Seattle Mariners utility player Miles Mastrobuoni has elected free agency, via the MiLB transaction log.
The move ends his tenure in the organization after two seasons and marks the formal conclusion of a year spent mostly in Triple-A following repeated roster decisions at the major-league level.
Mastrobuoni, a 30-year-old left-handed hitter who bats and throws right, spent the bulk of 2026 with the Triple-A Tacoma Rainiers after a turbulent start.
He began the year on the injured list with a right calf strain suffered while representing Italy in the World Baseball Classic.
Reinstated in early June, he appeared in a limited role for the Mariners—posting a .192/.241/.192 line in 26 at-bats across 13 games—before being designated for assignment on June 19.
He cleared waivers and was outrighted to Tacoma on June 25.
The Mariners briefly recalled him in early July when Julio Rodríguez landed on the concussion injured list, but Mastrobuoni was designated for assignment again shortly after Rodríguez’s return and outrighted back to Tacoma on July 21.
Because it was his second outright of the season, he held the right to elect free agency at that time but chose to remain with the Rainiers and continue playing.
He finished the minor-league campaign as organizational depth, providing positional versatility across the infield and outfield corners.
A career utility piece who has lined up at every position except catcher and center field, Mastrobuoni entered the majors with the Tampa Bay Rays in 2022 before stints with the Chicago Cubs and Mariners.
Across 208 big-league games, he has hit .228/.293/.271 with two home runs, 22 RBI, and 22 stolen bases, relying on defense, baserunning, and the ability to fill in wherever needed.
In 2025 with Seattle, he appeared in a career-high 76 games and hit .250.
With the regular season complete and Mastrobuoni never added back to the 40-man roster, the election of free agency simply formalized what the transaction log and prior offseason projections had already indicated: he would be available on the open market as a minor-league free agent.
For a glove-first depth option who has bounced between levels, the move offers a fresh start with another organization seeking reliable positional flexibility heading into 2027.
