Biography
Miles James Mastrobuoni (born October 31, 1995) is an American professional baseball utility player for the Seattle Mariners of Major League Baseball (MLB). He has previously played in MLB for the Tampa Bay Rays and Chicago Cubs.
Career
Amateur
Mastrobuoni attended Granada High School in Livermore, California, and the College of San Mateo, where he played college baseball for two years. He transferred to the University of Nevada, Reno to play college baseball for the Nevada Wolf Pack.
Tampa Bay Rays
The Tampa Bay Rays selected Mastrobuoni in the 14th round, with the 420th overall selection, of the 2016 Major League Baseball draft. He made his professional debut with the Low-A Hudson Valley Renegades, hitting .267 in 61 games. He spent the following season with the Single-A Bowling Green Hot Rods, playing in 104 games and batting .264/.346/.348 with 3 home runs, 39 RBI, and 18 stolen bases.
In 2018, Mastrobuoni again played in 104 games, split between the High-A Charlotte Stone Crabs and Double-A Montgomery Biscuits. In 330 at bats, he hit a combined .285/.385/.355 with one home run and an identical 39 RBI. He returned to Montgomery for the majority of the 2019 season, also playing in 4 games for the Triple-A Durham Bulls. Playing in 107 games for the Biscuits, he hit .299/.367/.389 with 4 home runs, 34 RBI, and 15 stolen bases.
Mastrobuoni did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. He returned to action in 2021, playing for both Montgomery and Durham. In 106 total games, he batted .296/.378/.424 with 5 home runs and 45 RBI. Mastrobuoni was assigned to Triple-A Durham to begin the 2022 season, where he spent the majority of the year. In 129 games, he hit .300/.377/.469 with career–highs in home runs (16), RBI (64), and stolen bases (23).
On September 22, 2022, Mastrobuoni was selected to the 40-man roster and promoted to the major leagues for the first time. The following day, Mastrobuoni collected his first MLB hit, a single off of Anthony Bass of the Toronto Blue Jays. He played in 8 games for the Rays during his rookie campaign, going 3–for–16 (.188) with a walk and a stolen base.
Chicago Cubs
On November 15, 2022, the Rays traded Mastrobuoni to the Chicago Cubs for pitcher Alfredo Zárraga. Mastrobuoni made the Cubs' Opening Day roster in 2023. He started at right field, batting ninth against the Milwaukee Brewers in Chicago's 2023 opener. On July 21, 2023, Mastrobuoni hit his first career home run against Jack Flaherty of the St. Louis Cardinals. In 60 games for the Cubs, he slashed .241/.308/.301 with one home run, five RBI, and 13 stolen bases.
Mastrobuoni made 50 appearances for Chicago during the 2024 campaign, batting .194/.245/.224 with no home runs, four RBI, and two stolen bases. On January 9, 2025, Mastrobuoni was designated for assignment following the acquisition of Matt Festa.
Seattle Mariners
On January 14, 2025, Mastrobuoni was traded to the Seattle Mariners for cash.
International career
Mastrobuoni played for Team Italy at the 2023 World Baseball Classic. Over five games, he batted 5-for-18 with two doubles, two RBIs, three strikeouts, and a stolen base.