A.J. Puk Bio
Andrew Jacob Puk, known professionally as A.J. Puk, is an American professional baseball pitcher for the Arizona Diamondbacks of Major League Baseball (MLB). A tall left-hander with a powerful fastball, Puk has built his career as both a starting pitcher and a late-inning reliever since debuting in 2019. He has previously pitched in MLB for the Oakland Athletics and the Miami Marlins.
Originally drafted sixth overall by the Oakland Athletics in 2016, Puk developed into one of the top pitching prospects in baseball before injuries reshaped his role. He has since emerged as a high-leverage bullpen arm, recording saves in both Oakland and Miami. Puk is currently working his way back from arm surgery with the Arizona Diamondbacks, where he continues to be viewed as a key piece of the pitching staff.
Early Life and Background
Andrew Jacob Puk was born on April 25, 1995, in Cedar Rapids, Iowa. He grew up in his hometown and attended Washington High School, where he was a multi-sport standout. In addition to serving as a first baseman and pitcher on the baseball team, Puk was the starting quarterback for the football squad, demonstrating the kind of competitive, multi-faceted athletic background that often translates well to high-level baseball.
His performance on the mound drew national attention, and Puk was selected by the Detroit Tigers in the 35th round of the 2013 Major League Baseball draft. Rather than sign, he opted to attend the University of Florida, where he played college baseball for the Florida Gators. The decision allowed him to further refine his raw talent and boosted his draft stock heading into his junior year.
Path to Baseball
As a freshman at the University of Florida, Puk appeared in 19 games and made seven starts, posting a 5–2 record with a 3.35 earned run average, 44 strikeouts, and one save. That summer, he pitched for the Waterloo Bucks of the Northwoods League, a well-known collegiate summer circuit that has produced many future big leaguers. He then played for the United States collegiate national team in 2015, and against Cuba, he combined with Tanner Houck and Ryan Hendrix to throw a no-hitter, an early signal of his big-league potential.
Off the field, Puk was briefly suspended after an April 2015 incident in which he and a teammate were charged with third-degree criminal trespass for climbing a crane inside a marked construction site on the Florida campus. The charge was later reduced to a misdemeanor, and Puk returned in time to help lead the Gators to the 2015 College World Series. He re-established himself as one of the top college pitchers in the country, and by the spring of 2016, evaluators ranked him among the top prospects eligible for that year’s draft.
A.J. Puk Career
Minor League Years (2016–2018)
The Oakland Athletics selected Puk in the first round of the 2016 MLB draft with the sixth overall pick, signing him to a contract that included a $4,069,200 signing bonus. He was assigned to the Vermont Lake Monsters of the Low-A New York-Penn League, where he finished 2016 with a 0–4 record and a 3.03 ERA across 10 starts. He spent 2017 with the Stockton Ports of the High-A California League and the Midland RockHounds of the Double-A Texas League, combining to go 6–10 with a 4.03 ERA and 184 strikeouts in 124 innings.
His ascent was temporarily halted on April 11, 2018, when Puk underwent Tommy John surgery, forcing him to miss the entire 2018 season. He began 2019 with Midland and was later promoted to the Las Vegas Aviators of the Triple-A Pacific Coast League before earning his first big-league call-up in August of that year.
Oakland Athletics Breakthrough (2019–2022)
The Athletics promoted Puk to the major leagues on August 20, 2019. He made his MLB debut on August 21 against the New York Yankees, retiring one of three batters faced. Just over two weeks later, on September 5, Puk earned his first career win, pitching two innings in relief with one earned run and two strikeouts. He finished his debut season with a 2–0 record, a 3.18 ERA, and 13 strikeouts across 10 appearances and 11⅓ innings.
A 2020 shoulder injury interrupted his momentum. Puk battled lingering throwing-shoulder issues during summer training, and on September 11, 2020, manager Bob Melvin officially shut him down for the season. He was scheduled to undergo shoulder surgery on September 16. Returning in 2021, Puk appeared in 12 games for Oakland, going 0–3 with a 6.08 ERA and 16 strikeouts in 13⅓ innings.
After being stretched out as a starter during spring training in 2022, Puk returned to the bullpen and emerged as a reliable late-inning option. In 62 appearances, he worked to a 4–3 record and a 3.12 ERA with 4 saves and 76 strikeouts in 66⅓ innings. He also recorded his first career save on July 22, 2022, against the Texas Rangers, a milestone that confirmed his transition into a high-leverage relief role.
Miami Marlins Era (2023–2024)
On February 11, 2023, the Oakland Athletics traded Puk to the Miami Marlins in exchange for outfielder JJ Bleday, a deal that signaled Miami’s plan to deploy him as a full-time reliever. In 58 appearances out of the bullpen, Puk compiled a 7–5 record and a 3.97 ERA with 78 strikeouts and 15 saves across 56⅔ innings, becoming a steady presence in the Marlins’ late-inning mix.
The Marlins attempted to convert Puk back into a starting pitcher in 2024. He made four starts for Miami, but struggled to a 9.22 ERA and was eventually placed on the injured list. After his return, Puk moved back to the bullpen and recovered his form, setting the stage for a midseason trade that brought him to a contender.
Arizona Diamondbacks Era (2024–Present)
On July 25, 2024, the Miami Marlins traded Puk to the Arizona Diamondbacks in exchange for Deyvison De Los Santos and Andrew Pintar. The move gave Puk an opportunity to contribute to a playoff race, and he delivered down the stretch, making 30 appearances for Arizona with a 1.32 ERA, 43 strikeouts, and two saves in 27⅓ innings. His late-season run helped stabilize a Diamondbacks bullpen that would go deep into the postseason.
He carried that momentum into 2025, recording a 3.38 ERA with 12 strikeouts and four saves across eight innings in eight appearances. On April 29, 2025, however, Puk was shut down after being diagnosed with a flexor strain and was transferred to the 60-day injured list two days later. On June 20, 2025, the team announced he had undergone an internal brace procedure and would miss the remainder of the season. Arizona continues to view him as a key part of its pitching plans once he recovers.
Notable Events and Milestones
Puk’s career has been defined by both triumph and adversity. He was the sixth overall pick in the 2016 MLB draft and made his MLB debut in 2019 against the New York Yankees, where he earned his first career win later that September. He recorded his first career save on July 22, 2022, against the Texas Rangers and, after a midseason trade to Arizona, was part of a Diamondbacks bullpen that made a deep postseason run in 2024. His professional path has also included a Tommy John surgery in 2018, a 2020 shoulder operation, and a 2025 internal brace procedure, injuries that have tested his resilience but also underscored his value whenever healthy.
A.J. Puk Career Stats
Through the 2025 MLB season, A.J. Puk has compiled a 17–20 win–loss record, a 3.53 earned run average, 283 strikeouts, and 26 saves across his time with the Oakland Athletics, Miami Marlins, and Arizona Diamondbacks. He has served in a variety of roles, including starting pitcher, setup man, and closer, demonstrating his versatility on the mound.
A.J. Puk Family
Personal Life
Details about A.J. Puk’s immediate family, marital status, and personal life outside of baseball are not widely documented in publicly available sources. Born and raised in Cedar Rapids, Iowa, he has often credited his hometown and his high school and college communities for helping shape his work ethic. Puk has generally kept his private life out of the public eye, focusing public attention on his performance between the lines.
2025 Season Performance
The 2025 season was a difficult one for A.J. Puk, who began the year as a key late-inning reliever for the Arizona Diamondbacks. He appeared in eight games, recording a 3.38 ERA with 12 strikeouts and four saves across eight innings, continuing the strong form he showed in the second half of 2024. His ability to miss bats and shut down opposing lineups had made him a trusted option in high-leverage situations.
On April 29, 2025, however, Puk was shut down with a flexor strain, and two days later he was transferred to the 60-day injured list. The Diamondbacks announced on June 20, 2025, that he had undergone an internal brace procedure, ending his season. Puk now faces a lengthy rehabilitation process, though the team has expressed optimism about his long-term outlook and continued role in the pitching staff.
