Miles Mastrobuoni – Seattle Mariners Biography, Contract, Net Worth Information

Miles Mastrobuoni has quietly become one of baseball’s most adaptable utility players since the Tampa Bay Rays drafted him in 2016.

He was born in San Ramon, California, on October 31, 1995. Mastrobuoni has built his career on flexibility and a stubborn persistence that not everyone notices.

For the 2025 season, Mastrobuoni will earn $768,000 with the Seattle Mariners, putting his career earnings near $1.73 million through 2025.

He’s carved out a spot in pro baseball by being able to handle just about any position thrown his way. Mastrobuoni’s estimated net worth sits at around $300,000, which makes sense given how recently he cracked the majors.

He started with the Rays, but found his way to Seattle, where he keeps working on his game.

What makes his story interesting? He was a 14th round pick—420th overall. Not exactly a headline-grabber. Still, his defensive flexibility and reliability have made him valuable.

Now with the Mariners for 2025, fans are curious to see how he keeps shaping his MLB role.

Early Life and Background

Miles Mastrobuoni’s journey to the majors started well before his pro debut with the Tampa Bay Rays.

His early years helped shape the adaptable player who eventually landed with the Seattle Mariners.

Family and Upbringing

Miles James Mastrobuoni was born on October 31, 1995, in San Ramon, California.

He grew up in the Bay Area, where baseball is pretty much woven into the local fabric—think San Francisco Giants and Oakland Athletics territory.

His Italian-American background shaped his childhood, giving him strong family values. That probably explains his team-first approach on the field.

His parents noticed his athletic side early on and backed his baseball dreams from the start.

During those years, Miles picked up a knack for playing all over the diamond, a skill that would define his pro career.

Education and Early Interests

Mastrobuoni went to the University of Nevada, where he worked on his baseball game and got an education.

He showed off his versatility and baseball smarts with the Nevada Wolf Pack, especially as a left-handed hitter.

Outside baseball, he got into fitness and nutrition—habits that would stick with him as a pro.

He took academics seriously, too, which helped him mentally prepare for the grind of pro ball.

His college performance caught the eyes of MLB scouts. The Tampa Bay Rays picked him in the 14th round (420th overall) of the 2016 MLB Draft, officially launching his professional journey.

Baseball Career and Achievements

Miles Mastrobuoni’s baseball career stretches from his minor league days to his current spot with the Seattle Mariners.

He’s built a reputation on versatility and steady performance, making himself a useful utility guy in the big leagues.

Minor League Journey

Mastrobuoni kicked off his pro career after the Tampa Bay Rays drafted him in 2016 out of Nevada.

He climbed steadily through the Rays’ farm system from 2016 to 2022.

He played just about everywhere—second, shortstop, third, and across the outfield. That flexibility became his calling card.

In 2022, he broke out with the Triple-A Durham Bulls, hitting over .300 and getting on base at a good clip.

His performance got him noticed as one of the Rays’ most reliable minor leaguers.

The Cubs traded for Mastrobuoni in November 2022. They liked his ability to play multiple spots and make contact at the plate.

Major League Debut and Milestones

Mastrobuoni made his MLB debut on September 22, 2022 with the Rays.

It wasn’t a long stint, but it capped off six years of grinding through the minors.

With the Cubs in 2023, he settled into a utility role, filling in wherever needed.

Manager David Ross leaned on his defensive skills, mostly at second and third base.

While his bat didn’t jump off the stat sheet, his glove kept him in the big leagues.

In Chicago, he played alongside guys like Patrick Wisdom and helped shore up the Cubs’ depth as the front office looked to the future.

Key Performances with the Cubs

During 2023, Mastrobuoni flashed the skills that made him a standout in the minors.

He stepped up at second and third base when injuries hit the roster.

He made some impressive defensive plays, saving runs and helping pitchers like Adbert Alzolay get out of jams.

At the plate, he focused on making contact and getting on base. Power wasn’t really his thing, but he did put up a few multi-hit games when given regular at-bats.

By 2024, his role with the Cubs shifted as the team kept evolving.

His contract of $768,000 with the Mariners for 2025 is the next step in his journey.

It’s pretty wild to think he went from a 14th-round pick to a steady big leaguer. That kind of grit and flexibility goes a long way in today’s game.

Contract Details and Earnings

Miles Mastrobuoni’s pro career has brought a mix of contracts, shaping his financial life in baseball.

His earnings have grown as he’s bounced between teams and picked up more experience.

Current Contract Structure

Mastrobuoni is making a modest salary by MLB standards right now.

In 2023, his salary was $720,500 a year, with no signing bonus.

That’s a typical pre-arbitration deal for newer big leaguers.

Heading into 2025, he’s still pre-arbitration eligible, with 1.077 years of service time as of January 2025.

If he keeps racking up service time, he’ll hit arbitration soon enough.

The Cubs, under Jed Hoyer, kept him on a team-friendly deal, which allowed them some roster flexibility and gave him chances in the majors.

Salary Progression Over the Years

Mastrobuoni’s pay history tracks his rise in pro baseball.

He got his first notable contract when the Rays picked him in the 14th round in 2016.

He spent years grinding in the minors before the Rays finally selected his contract on September 22, 2022, bumping him up to MLB pay.

After the Cubs acquired him, they re-signed him on March 23, 2023, at $720,500.

His net worth is about $297,266, which fits for someone new to MLB paychecks.

Looking ahead to 2025, his future earnings will depend on how he performs and whether he can lock down a bigger role with the Mariners.

Net Worth and Financial Management

Miles Mastrobuoni has built up a modest financial base through his time in MLB, making smart choices with his money.

His finances reflect his climb from the minors to the big leagues.

Estimated Net Worth in 2025

As of May 2025, Miles Mastrobuoni’s net worth is about $297,266, and it’s still growing as he plays.

His new contract with the Mariners gives him some real financial breathing room.

He signed a 1-year, $768,000 deal, a bump from his $720,500 salary.

That pay raise shows his growing value.

Some experts think his net worth could top $500,000 by the end of 2025 if he stays on the roster and hits some performance bonuses.

Mastrobuoni’s been careful with his money, focusing on long-term stability instead of flashy spending.

Sources of Income and Sponsorships

Most of Mastrobuoni’s income comes from his MLB contract, which pays out no matter how much he plays.

His base salary is the backbone of his finances.

He also picks up money from:

• Performance bonuses for games played or stats
• Small endorsement deals with gear companies
• Baseball camps and clinics in the offseason
• Appearance fees for fan events and autograph signings

He hasn’t chased big national sponsorships, preferring to work with regional brands that fit his lower-key profile.

That’s kept things manageable while still adding to his income.

Career Financial Highlights

Mastrobuoni’s financial path shows a slow climb from minor league stipends to solid MLB pay.

His first big league contract was a major step up.

A few highlights:

• He moved from minor league pay ($40,000–$90,000) to the MLB minimum
• He avoided credit card debt by budgeting tightly in the minors
• He started investment accounts early in his career
• He landed his first contract above the league minimum with the Mariners

He’s talked a bit about saving during his playing years. “Baseball careers can be short,” he said in a 2024 interview. “I’ve always tried to put away at least 30% of what I earn.”

His approach is a good example for young players who aren’t sure how long their careers will last.

Personal Life and Off-the-Field Activities

Miles Mastrobuoni keeps a pretty balanced life outside of baseball.

He splits his time between community work, personal interests, and the occasional media appearance.

He’s private about most things, but still connects with fans here and there.

Philanthropy and Community Engagement

Even though he’s new to MLB, Mastrobuoni has found ways to give back.

With both the Cubs and now the Mariners, he’s joined team community events, especially those that help young baseball players.

In the offseason, he heads back to San Ramon, California, where he grew up.

He sometimes volunteers at local baseball clinics, sharing his story from college ball at the University of Nevada to the majors.

His philanthropy isn’t flashy, but he’s committed to helping the next wave of players.

Teammates say he’s the type to quietly pitch in without needing the spotlight.

Lifestyle and Interests Beyond Baseball

Off the field, Mastrobuoni keeps active, but he tends to stay pretty private. Teammates often mention his focus on fitness and nutrition—no surprise, considering how much it helps his game.

He grew up rooting for the New York Yankees, and his family’s East Coast roots definitely shaped how he sees baseball. That connection hit home for him in a big way when he faced the Yankees as a pro and knocked his first MLB home run against them. That must’ve felt surreal.

Mastrobuoni doesn’t really talk much about his personal relationships in public. Still, his teammates say he stays close with his family.

His Italian heritage matters a lot to him. It shows up in the food he likes and even in some of the places he travels to during the off-season.

Lately, he’s gotten into real estate investments. He wants to set himself up for life after baseball, and honestly, that seems like a pretty smart move.

Media Presence and Data Collection Concerns

Mastrobuoni hardly uses social media, especially when you compare him to most MLB players. He just doesn’t seem interested in sharing much on the big platforms, which honestly fits his preference for keeping things private.

Whenever he talks to the media, he sticks to baseball. You won’t catch him opening up about his personal life. As his MLB salary increased to $720,500 a year, he became even more careful about what details get out there.

Chelsea, his partner, keeps things private too. You almost never see her at public baseball events.

They both choose what to share online, and honestly, you can’t blame them—lots of athletes do the same. Mastrobuoni interacts with fans at official team events, but he draws a line between his personal life and his job.