Adam McKinnlee Mazur Bio
Adam McKinnlee Mazur is an American professional baseball pitcher for the Miami Marlins of Major League Baseball. Born on April 20, 2001, in Woodbury, Minnesota, Mazur progressed from a standout high school arm to a nationally recognized college starter and a second-round pick in the 2022 MLB Draft.
Early Life and Background
Mazur grew up in Woodbury, Minnesota, and attended Woodbury High School where he established himself as a leading prep pitcher. As a senior he posted an 8–2 record with a 0.50 earned run average and recorded 112 strikeouts in 72 innings, earning All-Metro recognition from the Star Tribune.
After high school Mazur enrolled at South Dakota State to begin his collegiate career. He developed his workload and strikeout profile there and spent the summer of 2021 pitching for the Wareham Gatemen of the Cape Cod Baseball League, a common destination for top college prospects seeking high-level wood-bat competition.
Path to Baseball
Mazur’s time at South Dakota State included a sophomore season in which he made 12 starts, posting 88 strikeouts and a 5.43 ERA while going 2–7, a stretch that nevertheless showcased his ability to miss bats. Following that year he transferred to the University of Iowa to join the Hawkeyes and move into a Power Five conference environment.
At Iowa Mazur was named the Friday night starter and emerged as the staff ace for the Hawkeyes. His performance for Iowa earned him Big Ten Conference Pitcher of the Year honors in 2023, raising his profile ahead of the 2022 and 2023 professional evaluation cycles and making him a targeted arm for MLB clubs.
Adam McKinnlee Mazur Career
Early Career (2022–2023)
The San Diego Padres selected Mazur 53rd overall in the 2022 Major League Baseball draft, and he signed with the club for a reported $1.25 million signing bonus. He began his professional career in the Padres system and in 2023 split time between High-A Fort Wayne and Double-A San Antonio, appearing 24 times with 18 starts and compiling a 6–4 record, a 2.81 ERA, and 90 strikeouts in 96 innings.
Across those assignments Mazur worked primarily as a starter and demonstrated the strikeout upside that had marked his college seasons. His 2023 pro season served as the primary development year that pushed him toward upper-level minor league innings the following season.
San Diego Padres Breakthrough (2024)
Mazur opened the 2024 season back at Double-A San Antonio where he recorded a 1.95 ERA across six starts, prompting a promotion to Triple-A El Paso. In El Paso his results were more uneven over four starts, where he recorded 18 strikeouts and posted a 7.11 ERA as he adjusted to Triple-A competition.
On June 3, 2024, the Padres selected Mazur to their 40-man roster and promoted him to the major leagues for the first time; he made his MLB debut the following day. Across eight starts for San Diego in 2024 he collected 22 strikeouts in 33 2/3 innings and logged a 7.49 ERA as he gained first-hand exposure to big-league lineups.
Miami Marlins Era (2024–Present)
On July 30, 2024, the San Diego Padres traded Mazur along with Graham Pauley, Robby Snelling, and Jay Beshears to the Miami Marlins in exchange for Bryan Hoeing and Tanner Scott. Following the trade Mazur 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.
Mazur was optioned to Triple-A Jacksonville to begin the 2025 season but also made six starts for the Miami Marlins during that season, compiling an 0–4 record and a 4.80 ERA with 19 strikeouts over 30 innings. Through the close of the 2025 season his cumulative major league totals stood at a 1–7 record with a 6.22 ERA and 41 strikeouts, reflecting the early growing pains of a young starting pitcher transitioning to the majors.
Driving Style and Strengths
Mazur has built a profile as a starting pitcher with a capacity to miss bats and accumulate strikeouts at each level he has pitched. He has been used primarily in a traditional starter role, taking Friday night assignments in college and working multiple-inning turns in the minors, showing a focus on sequencing and the ability to generate swings and misses rather than relying solely on high contact rates.
Notable Events and Milestones
Key milestones in Mazur’s trajectory include his 2023 Big Ten Conference Pitcher of the Year award at Iowa, his selection with the 53rd overall pick in the 2022 MLB Draft, his major league debut in June 2024 after a promotion by the San Diego Padres, and his midseason trade to the Miami Marlins on July 30, 2024. Those moments mark his transition from prospect to major league player and reflect the accelerated timeline of his professional ascent.
Adam McKinnlee Mazur Career Wins
Across high school, college and the professional ranks Mazur has compiled winning efforts at each stage while also posting significant strikeout totals that speak to his potential. In professional baseball he recorded a 6–4 record in 2023 between High-A Fort Wayne and Double-A San Antonio and logged one major league victory through the end of the 2025 season according to available totals.
MLB Highlights
Mazur made his major league debut in June 2024 and accumulated eight starts for the San Diego Padres that season before the trade to Miami. His major league appearance totals through 2025 include 41 strikeouts and a 1–7 win–loss record, reflecting a stretch of adjustment as he faced major league hitters and moved between the big club and Triple-A.
Other Wins & Perfromances
In the minors Mazur’s 2023 season stands out, where he posted a 2.81 ERA with 90 strikeouts across 96 innings while splitting time between High-A Fort Wayne and Double-A San Antonio. His high school senior season and Cape Cod League experience further underline the strikeout and innings-building profile that propelled him to early professional opportunities.
Adam McKinnlee Mazur Family
Family Background and Baseball Lineage
Mazur grew up in Woodbury, Minnesota, and his early baseball development unfolded through the local high school program at Woodbury High School and then through collegiate programs at South Dakota State and Iowa. No public family lineage or family members connected to professional baseball are documented in the available records.
Personal Life
Public details about Mazur’s personal life beyond his hometown and education are limited in published sources. He is identified publicly by his full name, Adam McKinnlee Mazur, and has focused public attention on his athletic career from high school through the major leagues rather than on private personal disclosures.
2025 Season Performance
The 2025 season featured a mixture of Triple-A work and major league opportunities for Mazur as he moved between Jacksonville and Miami. He began the season optioned to Triple-A Jacksonville, made multiple starts there, and later made six starts for the Miami Marlins, totaling 30 innings with 19 strikeouts and a 4.80 ERA for the big club during those appearances.
That season illustrated the typical development arc of a young starter balancing refinement in Triple-A with repeated exposure to MLB hitters. Entering the following season the focus for Mazur remained on building consistency, extending his effectiveness deeper into starts, and converting his demonstrated strikeout ability into sustainable results at the major league level.