In the vast landscape of Major League Baseball, utility players often serve as the unsung heroes of their teams, providing versatility and depth across multiple positions. Miles Mastrobuoni embodies this role perfectly as he continues his MLB journey with the Seattle Mariners in 2025.
The California native has steadily worked his way through the minor league system and established himself as a valuable utility player known for his defensive flexibility and base-running abilities.
After spending time with the Tampa Bay Rays and Chicago Cubs, Mastrobuoni now finds himself in the Pacific Northwest, contributing to the Mariners’ lineup while constantly adapting his game to meet the demands of professional baseball’s highest level.
Miles Mastrobuoni’s Biography
| Personal Information | Details |
|---|---|
| Full Name | Miles James Mastrobuoni |
| Date of Birth | October 31, 1995 |
| Age | 29 |
| Place of Birth | San Ramon, California, U.S. |
| Nationality | American |
| Height | 5’10” |
| Weight | 185 lbs |
| Education | Granada High School (Livermore, CA), College of San Mateo, University of Nevada-Reno |
| MLB Debut | September 22, 2022 (Tampa Bay Rays) |
| Current Team | Seattle Mariners (#21) |
| Position | Utility Player |
| Net Worth | Approximately $300,000 |
| 2025 Salary | $768,000 |
| Career Earnings | $1,734,357 (through 2025) |
| Relationship Status | Dating Jessica Kulick |
| @miles_mastro |
Early Career
Miles Mastrobuoni’s baseball journey began in the sunny fields of California, where he developed his passion and skills for the game. Growing up in San Ramon, California, he attended Granada High School in nearby Livermore, where he distinguished himself as a talented baseball player.
During his high school career, Mastrobuoni was a three-year letter winner in baseball and also earned a one-year letter in football, demonstrating his all-around athletic abilities. His senior year proved particularly impressive as he helped lead Granada High School to an outstanding 24-2 record and a national ranking of 16th in the country.
After graduating from high school, Mastrobuoni chose to begin his collegiate baseball career at the College of San Mateo, a junior college in California. This decision would prove instrumental in his development as a player. During his freshman season in 2014, Mastrobuoni immediately made an impact, appearing in 39 games and posting a solid .310 batting average.
His first collegiate season also showcased his well-rounded skills as he collected 45 hits, scored 36 runs, drove in 22 RBIs, drew 27 walks, and demonstrated his speed on the basepaths with 27 stolen bases. The College of San Mateo finished with a respectable 24-15 record that season.
Mastrobuoni elevated his game even further during his sophomore campaign in 2015. He led the team with an impressive .347 batting average while appearing in 43 games. His leadership and performance were crucial factors in helping the Bulldogs capture the 2015 Coast Golden Gate conference championship, finishing with a stellar 30-13 overall record and a 17-5 mark in league play.
He led the team in multiple offensive categories, including hits (58), runs (49), walks (36), on-base percentage (.473), and stolen bases (24). His defensive prowess didn’t go unnoticed either, as he earned the Golden Glove award in both 2014 and 2015, establishing himself as a complete player who excelled both at the plate and in the field.
After his successful two-year stint at the College of San Mateo, Mastrobuoni transferred to the University of Nevada, Reno to continue his collegiate baseball career with the Nevada Wolf Pack. His transition to Division I baseball proved seamless as he immediately became an impact player for Nevada.
During his junior year in 2016, Mastrobuoni delivered a stellar season that earned him a spot on the All-Mountain West second team. He appeared in 61 games with 60 starts and compiled an impressive .364 batting average, establishing himself as one of the team’s offensive catalysts.
Mastrobuoni’s statistical output during his lone season at Nevada was remarkable. He collected 83 hits, scored 51 runs, and drove in 40 RBIs. His speed remained a valuable asset as he successfully stole 18 bases in 21 attempts, leading the team and ranking second in the Mountain West Conference in stolen bases. His offensive consistency was reflected in his .458 on-base percentage and .474 slugging percentage.
Defensively, he remained exceptional, posting a .986 fielding percentage with only four errors in 280 chances, contributing to Nevada setting a new program record for the lowest team fielding percentage.
Mastrobuoni’s leadership and performance were instrumental in Nevada’s successful 2016 campaign. He helped guide the Wolf Pack to a second-place finish in the Mountain West Conference and to the program’s first-ever Mountain West tournament finals appearance.
During the team’s impressive stretch run, where they won 20 of their final 24 games, Mastrobuoni batted .387 with 36 hits, 20 runs, and 18 RBIs. His postseason performance was equally impressive, as he batted .381 with eight hits, three runs, and three RBIs in six tournament games.
Throughout the season, he consistently delivered multi-hit performances, tallying 24 such games, along with 10 multi-RBI efforts. His consistent production and contributions on both sides of the ball caught the attention of professional scouts, setting the stage for the next chapter in his baseball career.
Professional Career
Mastrobuoni’s impressive collegiate performance caught the attention of MLB scouts, leading to his selection by the Tampa Bay Rays in the 14th round (420th overall) of the 2016 Major League Baseball Draft.
After signing with the organization, he began his professional journey with the Hudson Valley Renegades, the Rays’ Low-A affiliate in the New York-Penn League. His professional debut season showed promise as he hit .267 in 61 games and earned selection as a NYP Mid-Season All-Star, demonstrating his ability to quickly adapt to professional baseball.
The 2017 season saw Mastrobuoni advance to the Single-A Bowling Green Hot Rods in the Midwest League. Over 104 games, he continued to develop his skills, batting .264 with a .346 on-base percentage and .348 slugging percentage.
He collected 3 home runs, drove in 39 runs, and swiped 18 bases, showcasing his combination of modest power, run production, and speed. His solid performance earned him another All-Star selection, this time as a MID Mid-Season All-Star with the Hot Rods.
Mastrobuoni’s progression through the Rays’ farm system continued in 2018 as he split time between the High-A Charlotte Stone Crabs of the Florida State League and the Double-A Montgomery Biscuits of the Southern League. Across 104 games between the two levels, he compiled a .285 batting average with a .385 on-base percentage and .355 slugging percentage, along with one home run and 39 RBIs. His consistent performance at Charlotte earned him recognition as an FSL Mid-Season All-Star before his promotion to Double-A.
The 2019 season represented another step forward in Mastrobuoni’s development. Primarily playing for the Montgomery Biscuits, with a brief four-game stint with the Triple-A Durham Bulls, he delivered his most productive minor league season to date.
In 107 games with Montgomery, he posted an impressive .299 batting average with a .367 on-base percentage and .389 slugging percentage, along with 4 home runs, 34 RBIs, and 15 stolen bases. His outstanding season earned him multiple accolades, including SOU Mid-Season All-Star, SOU Best Utility Player, and SOU Post-Season All-Star honors. Additionally, he was named a MiLB.com Organization All-Star for the Tampa Bay Rays.
Like many minor leaguers, Mastrobuoni’s career progression was temporarily halted in 2020 due to the COVID-19 pandemic, which led to the cancellation of the minor league season. However, he returned to action in 2021, splitting time between Montgomery and Durham.
Across 106 games between the two levels, he batted .296 with a .378 on-base percentage and .424 slugging percentage, along with 5 home runs and 45 RBIs, showing continued development at the plate.The 2022 season proved pivotal for Mastrobuoni’s career.
Assigned to Triple-A Durham to begin the year, his strong performance earned him another MiLB.com Organization All-Star selection and INT Post-Season All-Star honors. His consistent production at the highest minor league level eventually led to his long-awaited Major League debut on September 22, 2022, when he suited up for the Tampa Bay Rays against the Toronto Blue Jays.
In his brief initial MLB stint with Tampa Bay, he appeared in 8 games, collecting 3 hits in 16 at-bats for a .188 batting average, while also recording his first major league stolen base.Mastrobuoni’s time with the Rays organization came to an end on November 15, 2022, when he was traded to the Chicago Cubs for minor league pitcher Alfredo Zarraga.
The trade represented a new opportunity for Mastrobuoni to establish himself at the major league level. During the 2023 season with the Cubs, he appeared in 60 games, batting .241 with a .308 on-base percentage and .301 slugging percentage. He hit his first career major league home run, drove in 5 runs, and showcased his speed by stealing 13 bases.
His versatility proved valuable to the Cubs as he filled multiple defensive positions.The 2024 campaign saw Mastrobuoni continue his role as a utility player for the Cubs, though his offensive production dipped. In 50 games, he batted .194 with a .245 on-base percentage and .224 slugging percentage, with 4 RBIs and 2 stolen bases. Throughout the season, he shuttled between Chicago and the Cubs’ Triple-A affiliate in Iowa as the organization managed its roster.
On January 9, 2025, the Cubs designated Mastrobuoni for assignment, and five days later, on January 14, 2025, he was traded to the Seattle Mariners for cash considerations.The trade to Seattle has provided Mastrobuoni with a fresh start in 2025. He made the Mariners’ Opening Day roster and has begun to contribute to his new club.
Through his first few games with Seattle (as of early April 2025), he has shown promising signs at the plate, batting .333 in limited action. As the 2025 season progresses, Mastrobuoni continues to embrace his role as a versatile utility player, capable of playing multiple infield and outfield positions while providing speed on the basepaths.
Girlfriend
Miles Mastrobuoni maintains a relationship with Jessica Kulick, though he tends to keep his personal life relatively private. Based on available information, the couple has been dating for some time, though specific details about when their relationship began are not widely documented.
Jessica occasionally appears in social media posts related to Mastrobuoni, supporting him through his baseball career as he’s moved from Tampa Bay to Chicago and now to Seattle.Unlike some professional athletes who maintain a high public profile regarding their relationships, Mastrobuoni has chosen a more low-key approach.
Miles Mastrobuoni’s Net Worth Details
Miles Mastrobuoni’s net worth is estimated to be $300,000 as of 2025.
Contract
Mastrobuoni is currently playing under a one-year, pre-arbitration contract with the Seattle Mariners for the 2025 season. As a player with just over one year of major league service time (1.077 years), he has not yet reached salary arbitration eligibility, which typically occurs after three years of MLB service. If he remains in the major leagues, he would reach his first year of arbitration eligibility following the 2027 season.
Salary
For the 2025 season, Mastrobuoni is earning a base salary of $768,000 with the Seattle Mariners. This represents a standard increment over his previous year’s salary, as is typical for pre-arbitration players with his level of experience. While this figure is modest by MLB standards, it represents the continued financial progression of his baseball career as he establishes himself at the major league level.
Career Earnings
| Year | Team | Salary/Earnings | Notes |
|---|---|---|---|
| 2016 | Tampa Bay Rays | $100,000 | Signing Bonus |
| 2022 | Tampa Bay Rays | $42,306 | MLB Debut (Partial Season) |
| 2023 | Chicago Cubs | $720,500 | First Full MLB Season |
| 2024 | Chicago Cubs | $746,000 | Second MLB Season |
| 2025 | Seattle Mariners | $768,000 | Current Season |
| Total Career Earnings | $1,734,357 | Through 2025 Season |
MLB Career Stats
| Season | Team | Games | AB | AVG | OBP | SLG | OPS | H | 2B | 3B | HR | RBI | R | SB | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | Tampa Bay | 8 | 16 | .188 | .235 | .188 | .423 | 3 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 6 |
| 2023 | Chicago Cubs | 60 | 133 | .241 | .308 | .301 | .609 | 32 | 5 | 0 | 1 | 5 | 24 | 13 | 13 | 32 |
| 2024 | Chicago Cubs | 50 | 98 | .194 | .245 | .224 | .470 | 19 | 3 | 0 | 0 | 4 | 9 | 2 | 7 | 17 |
| 2025* | Seattle | 3 | 6 | .333 | .333 | .333 | .667 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Career | 121 | 253 | .221 | .280 | .265 | .545 | 56 | 8 | 0 | 1 | 9 | 34 | 16 |
FAQs
1. Who is Miles Mastrobuoni and what team does he currently play for?
Miles James Mastrobuoni is an American professional baseball utility player born on October 31, 1995, in San Ramon, California. He currently plays for the Seattle Mariners, wearing #21. The 29-year-old left-handed batter joined the Mariners in January 2025 after previous stints with the Tampa Bay Rays and Chicago Cubs.
2. When did Miles Mastrobuoni make his MLB debut?
Miles Mastrobuoni made his Major League Baseball debut on September 22, 2022, with the Tampa Bay Rays. The Rays selected his contract and promoted him to the major leagues for the first time after he spent several years working his way through their minor league system.
3. What positions can Miles Mastrobuoni play?
Mastrobuoni is the definition of a utility player. He has professional experience playing second base, third base, shortstop, left field, right field, and center field. With the Cubs in 2024, he played at all infield positions except first base and catcher, plus both corner outfield spots.
4. What are Miles Mastrobuoni’s career MLB statistics?
Through April 1, 2025, Mastrobuoni has appeared in 119 major league games with a .219 batting average, .279 on-base percentage, and .263 slugging percentage. He has recorded 1 home run, 9 RBIs, and 16 stolen bases during his MLB career spanning three teams.
5. How did Miles Mastrobuoni reach the Seattle Mariners?
The Seattle Mariners acquired Mastrobuoni from the Chicago Cubs for cash considerations on January 14, 2025. The Cubs had designated him for assignment following their acquisition of Matt Festa. The trade marks Mastrobuoni’s third MLB franchise after Tampa Bay and Chicago.
6. Has Miles Mastrobuoni played in any international competitions?
Yes, Mastrobuoni represented Team Italy at the 2023 World Baseball Classic. During the tournament, he appeared in five games, batting 5-for-18 (.278) with two doubles, two RBIs, three strikeouts, and one stolen base, showcasing his skills on the international stage.
7. When did Miles Mastrobuoni hit his first MLB home run?
Mastrobuoni hit his first and currently only major league home run on July 21, 2023, while playing for the Chicago Cubs. The milestone homer came against pitcher Jack Flaherty of the St. Louis Cardinals at historic Wrigley Field in Chicago.
8. Where did Miles Mastrobuoni play college baseball?
Mastrobuoni attended Granada High School in Livermore, California, before playing college baseball at the College of San Mateo for two years. He then transferred to the University of Nevada, Reno to play for the Nevada Wolf Pack, where he hit .364 with a .932 OPS in 2016.
9. What are Miles Mastrobuoni’s strengths as a player?
Mastrobuoni’s greatest strengths include his defensive versatility, speed on the basepaths, and contact-oriented approach at the plate. He’s considered an average or above-average defender at multiple positions, puts the ball in play consistently, and provides valuable versatility for any roster.
10. What was a memorable moment in Miles Mastrobuoni’s MLB career?
A particularly meaningful moment for Mastrobuoni was playing at Yankee Stadium after being recalled to the Cubs in 2023. Growing up a Yankees fan with Derek Jeter as his favorite player, and with family from the East Coast attending the game, he called it “a very special moment.
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