Jack Kochanowicz Bio
Jack Von Kochanowicz is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB). Born on December 22, 2000, he made his MLB debut in 2024 after working his way through the Angels’ minor league system. Despite facing obstacles such as the canceled minor league season in 2020 due to the COVID-19 pandemic, he has emerged as a promising talent and is considered a player to watch in the coming years.
A right-handed starter wearing jersey number 41, Kochanowicz represents the Angels’ investment in young pitching depth. His path from a third-round draft selection in 2019 to a major league mound has included both encouraging stretches and difficult lessons that the organization continues to evaluate as he develops.
Early Life and Background
Jack Von Kochanowicz grew up in Pennsylvania and attended Harriton High School in Rosemont, where he first drew attention as a pitching prospect. Coming out of high school, he showcased the size and arm strength that scouts look for in a starting pitcher, and his performance on the amateur circuit helped establish him as a legitimate professional prospect.
After his freshman year of high school, Kochanowicz played for the Houston Banditos, a well-known travel baseball club that has produced numerous major leaguers. That experience against top competition from around the country helped sharpen his game and prepared him for the rigors of professional baseball. His surname, pronounced ko-HAWN-o-wits, reflects his family heritage, though specific details about his parents and home life are not widely documented in public sources.
Path to Baseball
Kochanowicz’s route to professional baseball began in earnest when the Los Angeles Angels selected him in the third round of the 2019 MLB draft with the 92nd overall pick. The Angels viewed him as a projectable arm worth developing, and he signed with the organization rather than attending college, betting on his long-term upside.
His first full professional season was delayed by the COVID-19 pandemic, which canceled the entire minor league season in 2020 and prevented him from logging any official game action during what would have been his first year in the system. That lost development time forced the Angels to be patient with his progression once play resumed.
Jack Kochanowicz Career
Early Career (2021–2023)
Kochanowicz made his professional debut in 2021 with the Single-A Inland Empire 66ers of the California League. He posted a 4–2 record with a 6.91 earned run average and 73 strikeouts across 20 games, including 18 starts, showing flashes of the strikeout ability that had drawn the Angels to him in the draft.
He returned to Inland Empire in 2022 and worked primarily as a reliever, finishing the year with a 4–4 record and 4.99 ERA over 17 appearances and 9 starts, recording 53 strikeouts. Mid-July of that season brought one of his first professional honors when he was named the California League pitcher of the week. In 2023, Kochanowicz split the year between the High-A Tri-City Dust Devils and the Double-A Rocket City Trash Pandas, going 5–5 with a 5.27 ERA and 69 strikeouts across 94 innings in 21 combined starts. On November 13, 2023, the Angels added him to their 40-man roster, protecting him from the Rule 5 draft and signaling that he was on track for a major league opportunity.
MLB Debut and First Victory (2024)
Kochanowicz opened the 2024 season at Triple-A Salt Lake with the Bees, continuing his development at the highest level of the minors. The Angels promoted him to the major leagues for the first time on July 11, 2024, and he debuted against the Seattle Mariners. His first outing proved challenging, as he threw three innings, surrendered five runs on seven hits, hit two batters with pitches, and took the loss.
He bounced back a month later, earning his first major league victory on August 11, 2024, against the Washington Nationals. That first win marked an important milestone in his young career and gave the Angels a glimpse of the pitcher they hoped he would become.
Los Angeles Angels Era (2024–Present)
Following his debut, Kochanowicz remained in the Angels’ rotation plans. In 2025, he made 30 starts for Los Angeles and went 3–11 with a 6.81 ERA over a full workload. His ERA finished as the highest among major league pitchers who logged at least 110 innings, and both his strikeout-to-walk ratio and his home runs allowed per nine innings ranked among the worst in the sport, a sobering stretch that underlined the gap between his raw tools and consistent results.
He returned to the Angels’ rotation in 2026 and made 13 starts, posting a 2–5 record and 6.19 ERA with 47 strikeouts across 64 innings of work. On June 9, 2026, the Angels announced that Kochanowicz would require Tommy John surgery, a procedure that ended his season and shifted the focus of his development to long-term recovery.
Notable Events and Milestones
Kochanowicz’s first major league victory on August 11, 2024, against the Washington Nationals stands as a defining early milestone. His addition to the Angels’ 40-man roster in November 2023 reflected organizational confidence, and his 2026 Tommy John surgery announcement marked a pivotal moment that will shape the next chapter of his career.
Jack Kochanowicz Career Wins
Jack Von Kochanowicz has compiled a small but growing ledger of wins since reaching the major leagues, with most of his victories coming during the 2025 season. Through the 2026 season, his major league win-loss record stood at 7–22, paired with a 5.84 career ERA and 144 strikeouts.
MLB Highlights
His first MLB win came on August 11, 2024, against the Washington Nationals, a moment that validated the patience the Angels had shown in his development. The 2025 season provided his largest body of major league work, though the results were mixed. His overall major league totals reflect a pitcher still establishing himself at the highest level.
Jack Kochanowicz Family
Family Background and Racing Lineage
Public information about Jack Von Kochanowicz’s immediate family is limited. His full name, including the middle name Von, points to a family background he has not detailed extensively in public interviews.
2025 Season Performance
The 2025 season was Jack Von Kochanowicz’s first full year in the Los Angeles Angels’ major league rotation. He made 30 starts and finished with a 3–11 record and a 6.81 ERA, a workload that provided valuable experience but also exposed areas needing refinement. Among pitchers with at least 110 innings pitched, his ERA ranked as the highest in the major leagues.
His peripheral numbers told a similarly difficult story, as his strikeout-to-walk rate and home runs allowed per nine innings ranked among the worst in baseball. Those statistics illustrated the gap between his raw stuff and the consistent execution required to succeed as a big league starter.
Heading into the following campaign, the Angels viewed the season as a learning year for a young pitcher still adjusting to major league hitters. Kochanowicz returned to the rotation in 2026 and made 13 starts before the June announcement of his need for Tommy John surgery brought his season to an early end and shifted the organization’s long-term outlook.
