Adam Mazur Bio
Adam McKinnlee Mazur is an American professional baseball pitcher for the Miami Marlins of Major League Baseball (MLB). Born on April 20, 2001, in Woodbury, Minnesota, he works from the mound as a right-handed starter who has moved quickly through the minors after a decorated college career. Drafted 53rd overall in 2022, Mazur has already logged major league time with both the San Diego Padres and the Miami Marlins. He is recognized for his college awards, his rapid ascent through the minor leagues, and his work ethic developed in the Midwest.
Standing as one of the more promising young arms to come out of the Big Ten Conference in recent years, Mazur pairs a power pitcher profile with a durable frame built during his Minnesota upbringing. His career has been shaped by a strong foundation at Woodbury High School, a developmental stop at South Dakota State, and a breakout season at the University of Iowa. Across every level he has reached, Mazur has continued to refine his command and his pitching arsenal.
Early Life and Background
Adam McKinnlee Mazur was born on April 20, 2001, in Woodbury, Minnesota, a suburb located east of Saint Paul. He grew up in the Woodbury community and attended Woodbury High School, where he quickly stood out as a pitching prospect. His Minnesota roots helped shape his work ethic, and he became a focal point of the Royals’ baseball program during his high school years.
During his senior season at Woodbury High School, Mazur posted an 8–2 record with a 0.50 ERA and 112 strikeouts across 72 innings pitched. That performance earned him All-Metro recognition from the Star Tribune, validating his status as one of the top high school arms in the state. His senior numbers hinted at the strikeout ability that would later define his professional profile.
Following high school, Mazur began his college baseball career at South Dakota State, where he continued to develop his command and his repertoire. After his sophomore season, in which he went 2–7 with a 5.43 ERA and 88 strikeouts in 12 starts, he made the decision to transfer and pursue a larger stage.
Path to Major League Baseball
Mazur transferred to the University of Iowa, joining a Big Ten Conference program known for producing polished college arms. During the summer of 2021, he played collegiate summer baseball for the Wareham Gatemen of the Cape Cod Baseball League, gaining valuable experience against top amateur talent. That summer circuit is widely regarded as one of the toughest testing grounds for future professional pitchers.
Heading into his first season at Iowa, Mazur was named the Hawkeyes’ Friday night starter, signaling his role as the team’s ace. He rewarded that trust with a strong campaign that ended with him being named the Big Ten Conference Pitcher of the Year. The award placed him among the most accomplished amateur pitchers in the country and set the stage for his entry into the 2022 MLB Draft.
The San Diego Padres selected Mazur 53rd overall in the 2022 Major League Baseball Draft, and he signed with the organization while receiving a $1.25 million signing bonus. The bonus reflected the Padres’ belief in his upside and his projection as a future big league starter. From that point forward, Mazur’s journey became a fully professional one.
Adam Mazur Career
Early Career (2023)
Mazur opened his professional career in 2023, splitting the season between the High-A Fort Wayne TinCaps and the Double-A San Antonio Missions. Across the two affiliates, he made 24 appearances, including 18 starts, posting a 6–4 record and a 2.81 ERA with 90 strikeouts across 96 innings pitched. The combined workload showed both his durability and his ability to miss bats at a consistent rate.
His performance at two levels in a single season signaled that the Padres viewed him as a fast-moving prospect. Mazur leaned on his strikeout profile while continuing to refine his secondary offerings and his command. By season’s end, he had positioned himself for a potential push toward Triple-A the following year.
San Diego Padres Era (2024)
Mazur began the 2024 season with Double-A San Antonio, where he recorded a 1.95 ERA across six starts. That strong run earned him a promotion to the Triple-A El Paso Chihuahuas, where he compiled a 7.11 ERA with 18 strikeouts across four starts. The contrast in results highlighted both his growth and the adjustments required at the highest minor league level.
On June 3, 2024, Mazur was selected to the Padres’ 40-man roster and promoted to the major leagues for the first time. He made his MLB debut the following day, fulfilling a career goal that had begun years earlier on the fields of Woodbury. In eight starts with San Diego, he recorded 22 strikeouts across 33⅔ innings pitched, gaining valuable major league experience before the trade deadline.
Miami Marlins Era (2025–Present)
On July 30, 2024, the Padres traded Mazur, along with Graham Pauley, Robby Snelling, and Jay Beshears, to the Miami Marlins in exchange for Bryan Hoeing and Tanner Scott. The move gave Mazur a fresh start within a rebuilding organization. After the trade, he made eight starts for the Triple-A Jacksonville Jumbo Shrimp down the stretch, posting a 2–3 record and a 5.21 ERA with 38 strikeouts across 38 innings pitched.
Mazur was optioned to Triple-A Jacksonville to begin the 2025 season as he continued to adjust to his new organization. He later returned to the major league club, where he made six starts for Miami, compiling an 0–4 record and a 4.80 ERA with 19 strikeouts over 30 innings of work. On March 11, 2026, Mazur underwent Tommy John surgery, ruling him out for the entirety of the 2026 season.
Driving Style and Strengths
Mazur is best known for his strikeout ability, having racked up triple-digit punchouts in multiple stops, including 112 strikeouts in 72 innings during his senior year of high school and 90 strikeouts across 96 innings in his first professional season. His power-pitching profile allows him to miss bats at every level, and his experience as a Friday night starter at Iowa has prepared him for high-leverage situations. Continued development of his command and secondary pitches will be central to his long-term projection as a starter.
Notable Events and Milestones
Among the most memorable milestones in Mazur’s career are his MLB debut with the Padres in June 2024, his Big Ten Conference Pitcher of the Year award, and his selection as the 53rd overall pick in the 2022 MLB Draft. His trade to the Miami Marlins in July 2024 marked the beginning of a new chapter, while his Tommy John surgery in March 2026 represents the latest significant event in his young career.
Adam Mazur Career Wins
Across his professional career, Mazur has accumulated wins at multiple levels, including a 6–4 record in 2023 between High-A Fort Wayne and Double-A San Antonio and an 8–2 record during his senior year at Woodbury High School. His MLB record through the 2025 season stands at 1–7 with a 6.22 ERA and 41 strikeouts. These figures reflect both his development path and the challenges of transitioning to the major leagues.
Major League Highlights
Mazur’s major league career began with the San Diego Padres in June 2024, where he made eight starts before being traded to the Miami Marlins at the deadline. He has since made six starts for Miami in 2025, continuing to gain valuable experience against big league lineups. Each outing represents a step forward in his development as a starting pitcher.
Other Wins and Performances
In addition to his major league appearances, Mazur has produced strong performances in the minor leagues, including a 1.95 ERA across six starts with Double-A San Antonio in 2024 and a 2.81 ERA across 24 appearances in 2023. His college résumé, highlighted by the Big Ten Conference Pitcher of the Year award, also stands as a key performance marker in his career.
Adam Mazur Family
Family Background and Racing Lineage
Adam McKinnlee Mazur grew up in Woodbury, Minnesota, where he developed his early love for baseball. He attended Woodbury High School and was named All-Metro by the Star Tribune during his senior year, reflecting the strong support system around him as he pursued the sport.
Personal Life
Mazur is an American professional baseball pitcher who was born and raised in Woodbury, Minnesota. His full name is Adam McKinnlee Mazur, and he continues his professional career with the Miami Marlins organization.
2025 Season Performance
Mazur was optioned to Triple-A Jacksonville to begin the 2025 season as the Miami Marlins worked to manage his development. After his time in the minors, he returned to the major league rotation, where he made six starts for Miami. Across those appearances, he compiled an 0–4 record and a 4.70 ERA with 19 strikeouts over 30 innings of work, continuing to adjust to major league hitters.
His 2025 campaign was a learning year marked by both opportunity and adversity, as he worked to translate his minor league strikeout profile into consistent major league results. Following the season, Mazur underwent Tommy John surgery on March 11, 2026, a significant procedure that will keep him off the mound for the entirety of the 2026 season. The surgery marks a setback but also a chance to reset and return to full strength.
Looking ahead, the Marlins remain invested in Mazur’s long-term potential as a starter, and his progression through the organization has been steady despite the challenges. His combination of swing-and-miss stuff and his experience as a Friday night starter at Iowa continue to make him an intriguing arm to monitor once he returns from rehabilitation. His development timeline will be a key storyline for Miami’s pitching pipeline in the coming years.
