Mason McCoy Bio
Mason Steven McCoy is an American professional baseball infielder for the San Diego Padres of Major League Baseball. McCoy reached the major leagues with the Toronto Blue Jays in 2023 and has built a career marked by defensive reliability, base-stealing ability and a sustained ascent through the minor leagues.
Early Life and Background
Mason Steven McCoy was born on March 31, 1995. He graduated from Washington Community High School in Washington, Illinois, where he starred in multiple sports and earned all-conference honors playing basketball and soccer in addition to baseball. McCoy has two younger siblings.
After high school, McCoy attended Illinois Central College and continued his baseball development. He played summer baseball for the La Crosse Loggers of the Northwoods League in 2015 and was named the league’s most valuable player, a recognition that helped raise his profile before transferring to the University of Iowa to play for the Iowa Hawkeyes.
Path to Baseball
McCoy’s path to professional baseball followed a steady development through junior college and Division I competition. He transferred to the University of Iowa and returned there for his senior season after going undrafted in 2016. As a senior he served as a team captain and produced a .328 batting average with five home runs and 34 runs batted in, showcasing improved plate discipline and leadership that helped prepare him for the professional ranks.
The Baltimore Orioles selected McCoy in the sixth round, with the 188th overall pick, of the 2017 Major League Baseball draft, beginning his professional career in the Orioles organization in 2017.
Mason McCoy Career
Early Career (2017–2021)
McCoy made his professional debut in 2017 with the Low-A Aberdeen IronBirds, where he posted a .301 batting average with one home run and 29 RBI in 53 games. He continued to work his way through the Baltimore farm system in 2018 and 2019, spending time with the Delmarva Shorebirds, Frederick Keys and Bowie Baysox and producing consistent on-base and defensive work.
The 2020 minor league season was canceled, and McCoy returned to action in 2021 at Triple-A Norfolk with the Norfolk Tides. In Triple-A he recorded nine home runs, 43 RBI and 13 stolen bases across 112 games, demonstrating both power growth and continued baserunning value.
Baltimore Orioles Tenure (2017–2021)
During his time in the Orioles organization McCoy established himself as a contact hitter with on-base ability and athleticism on the infield. His progression through Low-A to Triple-A included seasons of steady improvement and a reputation for professional approach and versatility across infield positions.
McCoy’s minor-league performance laid the foundation for his later breakout seasons at Triple-A with other organizations and ultimately for his promotion to the major leagues.
Seattle Mariners Breakthrough (2022–2023)
On April 7, 2022, the Baltimore Orioles traded McCoy to the Seattle Mariners for cash considerations. Assigned to the Triple-A Tacoma Rainiers, McCoy enjoyed a career year in 2022, appearing in 124 games and hitting .256/.332/.473 with a career-high 21 home runs, 63 RBI and 22 stolen bases. His offensive jump included career-high power totals and a notable increase in extra-base production.
Defensively, McCoy set a Tacoma shortstop record for highest fielding percentage, committing only six errors all season for a .986 fielding percentage. He returned to Tacoma in 2023 and continued to contribute with 11 home runs, 55 RBI and 20 stolen bases in 87 games prior to a midseason move.
Toronto Blue Jays Debut (2023)
On July 26, 2023, the Seattle Mariners traded McCoy to the Toronto Blue Jays in exchange for Trent Thornton. Assigned to the Triple-A Buffalo Bisons, McCoy was added to the Blue Jays’ 40-man roster and promoted to the major leagues on August 29, 2023 following an injury to Bo Bichette.
Mason McCoy made his major league debut on August 30, 2023, appearing as a pinch hitter. Across six games with Toronto he served primarily as a defensive replacement and pinch runner. He was designated for assignment in September, cleared waivers and was outrighted to Buffalo, preserving his status as a player with MLB experience and continued Triple-A availability.
San Diego Padres Era (2024–Present)
McCoy signed a minor league contract with the San Diego Padres on November 19, 2023 that included an invitation to spring training. He opened the 2024 season with the Triple-A El Paso Chihuahuas and appeared in 108 games, slashing .260/.329/.382 with five home runs, 50 RBI and 25 stolen bases, underlining his value as a speed-and-defense infielder with on-base skills.
The Padres selected McCoy’s contract on August 21, 2024 and he made his first start for San Diego the following day. In 19 major-league games for the Padres in 2024 he hit .204 with three RBI and one stolen base. The Padres non-tendered McCoy in November 2024 and he re-signed with the organization on a minor league deal in December 2024. In 2025 the Padres selected his contract again on March 22 and optioned him to Triple-A before recalling him on April 21. A dislocated finger landed him on the injured list on April 29; he returned to Triple-A on May 20 and was optioned to begin the 2026 season.
Driving Style and Strengths
McCoy profiles as a defense-first infielder with above-average speed and base-stealing ability. His Tacoma fielding percentage record highlights reliable glovework and range at shortstop, while his stolen-base totals at Triple-A speak to his effectiveness on the basepaths. Offensively he offers contact skills and on-base ability rather than overwhelming power, and he provides roster depth through versatility across infield positions.
Notable Events and Milestones
Key milestones in McCoy’s career include being named the Northwoods League Most Valuable Player in 2015, his selection in the sixth round of the 2017 MLB draft by the Baltimore Orioles, his record-setting .986 fielding percentage at Triple-A Tacoma in 2022 and his major league debut with the Toronto Blue Jays on August 30, 2023. His promotion to the San Diego Padres active roster in August 2024 marked his first extended opportunity with a new organization.
Mason McCoy Career Wins
Across his professional career McCoy has combined steady minor league production with sporadic major-league opportunities. Through the 2025 season his MLB totals include a .181 batting average with four runs batted in and no home runs, while his Triple-A seasons include standout power and speed years, notably the 21-home-run campaign in 2022 and a 25-stolen-base season in 2024 with El Paso.
Major League Highlights
McCoy’s major-league milestones are concentrated in 2023 and 2024. He debuted with the Toronto Blue Jays in August 2023 and later made starts for the San Diego Padres in 2024. While his MLB offensive counting numbers remained modest through 2025, his defensive contributions and baserunning have been central to his role in big-league call-ups.
Other Wins & Perfromances
At the minor league level McCoy has recorded multiple seasons of value: a .301 batting average in his pro debut with Aberdeen in 2017, a .290 combined average across High-A and Double-A in 2019, and the career-best 21 home runs alongside 22 stolen bases in Tacoma in 2022. His Northwoods League MVP award in 2015 and steady Triple-A production have been key drivers of his promotions.
Mason McCoy Family
Family Background and Baseball Lineage
Public records note that McCoy grew up in Washington, Illinois, and that he has two younger siblings. There is no widely published public record of extended baseball lineage or professional family ties in available sources.
Personal Life
McCoy maintained a low-profile personal life through his collegiate and professional career. His public biography highlights his leadership as a team captain at the University of Iowa and his multi-sport high school background, but it does not list public details about a spouse or children.
2025 Season Performance
The 2025 season featured roster movement and an injury for McCoy. The San Diego Padres selected his contract in March and optioned him to Triple-A before recalling him in April amid an injury to a teammate. A dislocated finger in late April briefly sidelined him; he returned to Triple-A on May 20. The 2025 arc emphasized McCoy’s role as organizational depth with the ability to contribute defensively and on the bases when called upon, while his immediate outlook centered on regaining full health and producing at Triple-A to earn future major-league opportunities.