Miles Mastrobuoni Bio
Miles James Mastrobuoni 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, establishing himself as a versatile defender capable of handling multiple positions around the diamond. Mastrobuoni was selected by the Rays in the 14th round of the 2016 MLB draft and reached the major leagues in 2022. He is also an international baseball veteran, having represented Italy in the 2023 World Baseball Classic.
Early Life and Background
Miles James Mastrobuoni was born on October 31, 1995, in Livermore, California, USA. He grew up in his hometown and attended Granada High School, where he developed his baseball skills and began attracting college-level attention. After completing his time at Granada, Mastrobuoni continued his baseball career at the College of San Mateo, playing two seasons of college baseball for the program.
Following his time at the junior college level, Mastrobuoni transferred to the University of Nevada, where he played for the Nevada Wolf Pack. His progression through the college ranks gave him exposure to more advanced competition and helped prepare him for the next step in his career. In summer 2015, he played summer league baseball for the Rochester Honkers of the Northwoods League, gaining additional experience against high-level amateur talent.
Path to Professional Baseball
After his collegiate career with the Nevada Wolf Pack, Mastrobuoni entered the 2016 Major League Baseball draft. The Tampa Bay Rays selected him in the 14th round, with the 420th overall pick, recognizing his defensive versatility and offensive potential. He quickly signed with the organization and began his climb through the minor leagues.
Mastrobuoni made his professional debut with the Low-A Hudson Valley Renegades, hitting .267 across 61 games. He advanced to the Single-A Bowling Green Hot Rods the following season, batting .264 with three home runs and 18 stolen bases. Splitting 2018 between the High-A Charlotte Stone Crabs and Double-A Montgomery Biscuits, he hit a combined .285, showing the consistency that would define his development. In 2019, he spent most of the year at Montgomery and earned a brief look with the Triple-A Durham Bulls, hitting .299 with four home runs and 15 stolen bases. The 2020 minor league season was canceled because of the COVID-19 pandemic, and he returned to action in 2021 with Montgomery and Durham. In 2022, he dominated at Triple-A Durham, hitting .300 with career-highs of 16 home runs, 64 RBI, and 23 stolen bases, earning his first major league call-up.
Miles Mastrobuoni Career
Early Career (2016–2019)
Mastrobuoni began his professional journey in 2016 with the Hudson Valley Renegades, where he batted .267 in 61 games and adjusted to the speed of professional baseball. The following year, he moved up to Single-A Bowling Green, where his on-base skills stood out, posting a .346 on-base percentage along with three home runs and 18 stolen bases.
In 2018, Mastrobuoni split time between the High-A Charlotte Stone Crabs and the Double-A Montgomery Biscuits, hitting a combined .285 with a strong .385 on-base percentage. He returned to Montgomery for most of 2019, producing a .299 average with four home runs, 34 RBI, and 15 stolen bases, while also making a brief four-game appearance with the Triple-A Durham Bulls. These developmental years established him as a reliable contact hitter and base stealer.
Tampa Bay Rays Breakthrough (2020–2022)
The 2020 minor league season was canceled because of the COVID-19 pandemic, keeping Mastrobuoni off the field for the year. He returned in 2021 and split time between Montgomery and Durham, batting .296 with five home runs and 45 RBI across 106 games. His strong play earned him an assignment to Triple-A Durham to open the 2022 season, where he produced a career-best .300 average with 16 home runs, 64 RBI, and 23 stolen bases in 129 games.
On September 22, 2022, the Rays added Mastrobuoni to the 40-man roster and promoted him to the major leagues for the first time. The following day, he recorded his first MLB hit, a single off Anthony Bass of the Toronto Blue Jays. He appeared in eight games for Tampa Bay, going 3-for-16 with a walk and a stolen base to close his first major league season. On November 15, 2022, the Rays traded him to the Chicago Cubs for pitcher Alfredo Zárraga.
Chicago Cubs Era (2023–2024)
Mastrobuoni made the Cubs’ Opening Day roster in 2023 and started in right field, batting ninth against the Milwaukee Brewers in Chicago’s season opener. On July 21, 2023, he hit his first career home run, connecting off Jack Flaherty of the St. Louis Cardinals. In 60 games during his rookie season, he slashed .241/.308/.301 with one home run, five RBI, and 13 stolen bases.
He made 50 appearances for Chicago in 2024, batting .194/.245/.224 with no home runs, four RBI, and two stolen bases. On January 9, 2025, the Cubs designated Mastrobuoni for assignment following the acquisition of Matt Festa, opening the door for his next opportunity.
Seattle Mariners Era (2025–Present)
On January 14, 2025, Mastrobuoni was traded to the Seattle Mariners for cash considerations. He began the year as a utility player for Seattle before being sent to the Triple-A Tacoma Rainiers following the acquisition of Josh Naylor. He returned to the majors within a week as Ben Williamson was demoted, and was sent back to Tacoma after the Little League Classic in August.
Mastrobuoni played in the final game of the 2025 regular season, hitting a double that was the final extra-base hit allowed by Clayton Kershaw of the Los Angeles Dodgers in his regular season career. He finished the 2025 regular season batting .250/.324/.296 with one home run, 12 RBI, and six stolen bases in 76 games for the Mariners. The Mariners added Mastrobuoni to their roster for the American League Championship Series, replacing Luke Raley.
Driving Style and Strengths
Mastrobuoni is valued throughout his career for his defensive versatility, able to handle multiple positions around the diamond as a true utility player. His strengths include reliable contact hitting, strong on-base skills, and consistent base-stealing ability. He brings energy and flexibility to rosters, making him a valuable role player for contenders.
Notable Events and Milestones
One of the most memorable moments of Mastrobuoni’s career came on July 21, 2023, when he hit his first career home run off Jack Flaherty. Another signature milestone occurred in the final game of the 2025 regular season, when his double marked the last extra-base hit surrendered by Clayton Kershaw in his regular season career. He also represented Italy in the 2023 World Baseball Classic, an international honor that highlighted his family heritage.
Miles Mastrobuoni Career Wins
Miles Mastrobuoni has built his professional resume around consistent offensive production and base-running speed rather than dominant win totals as a pitcher or top-of-the-order power hitter. His career highlights are defined more by versatile contributions, timely hits, and stolen bases than by traditional counting statistics like wins. Below is a summary of his notable achievements across his professional seasons.
MLB Highlights
Across his time with the Tampa Bay Rays, Chicago Cubs, and Seattle Mariners, Mastrobuoni has provided versatile defense and contact at the plate. His first MLB hit came on September 23, 2022, a single off Anthony Bass of the Toronto Blue Jays, and his first home run came on July 21, 2023, off Jack Flaherty. He also recorded 21 total stolen bases across his first three MLB seasons, demonstrating his speed on the basepaths.
Other Wins and Performances
In the 2023 World Baseball Classic, Mastrobuoni represented Italy, batting 5-for-18 with two doubles, two RBI, and a stolen base over five games. In the minor leagues, he posted a career-best .300 average with 16 home runs and 64 RBI at Triple-A Durham in 2022, a season that earned him his first major league call-up.
Miles Mastrobuoni Family
Family Background and Racing Lineage
Details about Miles Mastrobuoni’s parents and immediate family are not publicly verified in available sources. His Italian heritage, however, is well documented through his participation with Italy’s national team at the 2023 World Baseball Classic.
Personal Life
Miles Mastrobuoni has kept much of his personal life private, and no verified public information is available regarding a spouse or children. He continues to reside in the United States while playing professional baseball.
2025 Season Performance
The 2025 season marked a new chapter for Mastrobuoni after he was traded to the Seattle Mariners for cash in January. He began the year as a utility player, providing defensive flexibility across multiple positions. He was briefly optioned to the Triple-A Tacoma Rainiers after the Mariners acquired Josh Naylor, but he returned to the majors within a week following Ben Williamson’s demotion.
Across 76 games with Seattle, Mastrobuoni batted .250/.324/.296 with one home run, 12 RBI, and six stolen bases, contributing in a depth role throughout the season. He was sent back to Tacoma after the Little League Classic in August but returned for the final game of the regular season, where his double off Clayton Kershaw marked the final extra-base hit Kershaw allowed in his regular season career.
Mastrobuoni’s strong finish earned him a spot on Seattle’s postseason roster, as the Mariners added him for the American League Championship Series in place of Luke Raley. His ability to play multiple positions and deliver in key moments made him a trusted piece of the Mariners’ roster down the stretch. With his 2025 performance showing steady contact and base-running value, Mastrobuoni remains a reliable utility option for Seattle heading into the next season.