Jacob Misiorowski Bio
Jacob Walter Misiorowski, nicknamed “the Miz,” is an American professional baseball pitcher for the Milwaukee Brewers of Major League Baseball (MLB). Born on April 3, 2002, Misiorowski grew up in the Kansas City metropolitan area and developed into one of the most talked-about young arms in the sport. He made his MLB debut in 2025 after being selected by the Milwaukee Brewers in the 2022 MLB draft and quickly became a national story with record-setting velocity and a fast rise to the All-Star Game. His combination of size, power, and poise has positioned him as a central figure in the Brewers’ long-term plans.
Misiorowski earned recognition in high school and at the junior college level before entering professional baseball. His exceptional pitching skills have drawn widespread attention, leading to a swift climb through the Brewers’ ranks and a standout rookie campaign. By the middle of his second major league season, he had already established himself as one of the most electric starters in baseball.
Early Life and Background
Jacob Walter Misiorowski was born on April 3, 2002, in Blue Springs, Missouri, and grew up in nearby Grain Valley. He attended Grain Valley High School, where he emerged as a high-upside pitcher with a powerful fastball. As a junior in 2019, Misiorowski posted a 9–2 win-loss record with a 1.48 earned run average (ERA) and was named All-State, drawing early attention from professional scouts.
His senior season in 2020 was canceled due to the COVID-19 pandemic, which significantly lowered his chances of being drafted that year. Major League Baseball’s decision to shorten the 2020 draft to five rounds further reduced his opportunities, and Misiorowski chose to honor his commitment to play college baseball. He initially committed to Oklahoma State before ultimately enrolling at Crowder College, a junior college program in Neosho, Missouri.
Misiorowski appeared in only two games as a freshman at Crowder in 2021 before a torn meniscus ended his season. He then committed to transfer to Louisiana State University for his final three years of collegiate eligibility. Returning to Crowder for a second season in 2022, he made 15 starts and was named a second-team NJCAA All-American after going 10–0 with a 2.72 ERA and 136 strikeouts in 76 innings pitched.
Path to Professional Baseball
Following the 2022 college season, Misiorowski participated in the Major League Baseball Combine and recorded eight of the fastest pitches thrown at the event, averaging 99.8 miles per hour on his fastball. Those numbers generated widespread attention and the expectation that he would be selected early in the 2022 MLB draft. Although he had committed to Louisiana State, his combination of size, velocity, and projection made him a target for teams selecting in the early rounds.
The Milwaukee Brewers selected Misiorowski 63rd overall in the 2022 MLB draft. He signed with the Brewers on July 27, 2022, for an over-slot signing bonus of $2.35 million, well above the slot value of $1.1 million for that pick. The Brewers viewed him as a long-term starting pitcher, and in August 2024, they promoted him to the Triple-A Nashville Sounds while giving him bullpen experience to prepare for a potential major league role later that season.
Jacob Misiorowski Career
Early Career (2022–2024)
After signing with the Brewers in 2022, Misiorowski began his professional progression through the organization’s minor league system. The Brewers developed him as a starting pitcher while allowing him to build arm strength and refine his secondary offerings. In 2024, the organization promoted him to Triple-A Nashville and briefly shifted him to the bullpen to evaluate a potential relief role, though the team’s stated long-term plan remained for him to start.
To begin the 2025 season, Baseball America rated Misiorowski as the Brewers’ third-best prospect. He opened the year at Triple-A Nashville, where he posted a 2.13 ERA with 80 strikeouts in 13 appearances. By June of that year, Baseball America had ranked him as the 21st-best prospect in all of baseball, setting the stage for his major league promotion.
MLB Debut and Rookie Season (2025)
On June 12, 2025, Misiorowski was promoted to the major leagues for the first time. In his MLB debut, he earned a win after throwing five innings of no-hit baseball, and his start featured the fastest pitch thrown by a Brewers pitcher in the Statcast era, reaching 102.3 miles per hour. In his second start against the Minnesota Twins, he threw six perfect innings, becoming the first MLB player to record 11 no-hit innings to start a career since 1961.
His third start, against Paul Skenes and the Pittsburgh Pirates, made him the first MLB pitcher since 1901 to allow five hits or fewer across his first three career starts. In his fifth start against Clayton Kershaw and the Los Angeles Dodgers, Misiorowski struck out twelve batters in six frames, including a near-immaculate inning, and induced a league-leading twenty-one swings-and-misses. On July 11, 2025, he was named to the National League All-Star roster as a replacement for Matthew Boyd, becoming the fastest player in league history to become an All-Star after just five major league games.
Misiorowski struggled after the All-Star break, going 1–2 with a 5.89 ERA in his final nine regular-season appearances. He finished the regular season with a 5–3 record, a 4.36 ERA, and 87 strikeouts in 66 innings pitched, and he finished 11th in National League Rookie of the Year voting. He was kept on Milwaukee’s postseason roster and delivered a 2–0 record with a 1.29 ERA in the National League Division Series against the Chicago Cubs, including a win in Game 5. He finished the postseason with a 2–1 record, a 1.50 ERA, and 16 strikeouts in 12 innings across the NLDS and NLCS.
Second MLB Season (2026)
On March 20, 2026, the Brewers announced that Misiorowski would be the Opening Day starter on March 26 against the Chicago White Sox, making him the youngest Brewers pitcher to start on Opening Day since Ben Sheets in 2002 and the third youngest in franchise history. He struck out 11 batters in five innings, a Brewers Opening Day record, and earned the decision in a 14–2 win. On May 1, 2026, he threw 5 1/3 hitless innings against the Washington Nationals before exiting with a right hamstring cramp, and during May he posted a 29 1/3-inning scoreless streak that ended on Memorial Day. He completed May with a 0.23 ERA.
On June 6, 2026, Misiorowski set a new record for the fastest pitch by a starting pitcher since tracking began in 2008, throwing 103.7 mph to Kyle Karros of the Colorado Rockies. Six days later, against the Philadelphia Phillies, he topped that mark with a 104.5 mph fastball to Kyle Schwarber. In the same game, he completed a Maddux, throwing a one-hit shutout on 95 pitches with 15 strikeouts, the most ever by a pitcher accomplishing the feat. Through games of June 19, 2026, he had a 13–6 record, a 2.66 ERA, and 225 strikeouts.
Notable Events and Milestones
Misiorowski’s career has been defined by velocity records and historic debut feats. He became the fastest player in MLB history to reach the All-Star Game, the first pitcher since 1901 to allow five hits or fewer across his first three career starts, and the record-holder for the fastest pitch by a starting pitcher in the Statcast era. His 15-strikeout Maddux against the Phillies set a new standard for the feat, and his Opening Day strikeout total established a Brewers franchise record.
Jacob Misiorowski Career Highlights
Across his minor league stops, his rookie MLB campaign, and his record-setting second season, Misiorowski has accumulated a growing list of accomplishments. He was named a 2025 National League All-Star, signed an over-slot bonus as a 2022 draft pick, and produced multiple historic statistical lines as a major league starter.
MLB Highlights
In the major leagues, Misiorowski has registered a fastball that has repeatedly set Statcast-era records for starting pitchers. His 11 no-hit innings to begin his career ranked as the longest such stretch since 1961, and his All-Star selection came after just five major league appearances. Through mid-June of 2026, he had accumulated 13 wins and 225 strikeouts while posting a 2.66 ERA.
Other Performances
Misiorowski earned All-State honors as a high school junior in 2019 and was named a second-team NJCAA All-American at Crowder College in 2022 after going 10–0 with a 2.72 ERA. He also posted a 2.13 ERA with 80 strikeouts in 13 Triple-A appearances in 2025 before his promotion to the major leagues.
Jacob Misiorowski Family
Family Background and Personal Life
Misiorowski is of Polish descent and has expressed interest in representing Poland in the World Baseball Classic. He grew up a fan of the Kansas City Royals and developed his love for the game in the Kansas City metropolitan area before pursuing baseball full-time. He is an avid Pokémon fan and card collector in his time away from the mound.
In 2026, Misiorowski became engaged to his fiancée, Elle. He continues to make his off-season home in the Midwest while training for the demands of a major league starting role.
2025 Season Performance
Misiorowski’s 2025 season was a storybook rookie year defined by historic first impressions. He opened his major league career with 11 no-hit innings, posted a 5–3 regular-season record, and was selected to the National League All-Star team after only five major league games. His debut season generated significant national attention and established him as one of the most exciting young arms in the sport.
After a difficult stretch following the All-Star break, Misiorowski delivered a strong postseason, helping the Brewers advance through the National League Division Series against the Chicago Cubs with two wins and a 1.29 ERA. He appeared in the National League Championship Series against the Los Angeles Dodgers, finishing the postseason with a 2–1 record, a 1.50 ERA, and 16 strikeouts in 12 innings. His rookie campaign set the foundation for the velocity records and milestones that defined his second season in 2026.
