Article · Wikipedia archive · Last revised Jul 26, 2026

Jack Kochanowicz

Jack Von Kochanowicz is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB). He made his MLB debut in 2024.

Last revised
Jul 26, 2026
Read time
≈ 3 min
Length
696 w
Citations
17
Source
Wikipedia ↗
Jack Kochanowicz
Los Angeles Angels – No. 41
Pitcher
Born: (2000-12-22) December 22, 2000
Philadelphia, Pennsylvania, U.S.
Bats: Left
Throws: Right
MLB debut
July 11, 2024, for the Los Angeles Angels
MLB statistics
(through 2026 season)
Win–loss record7–22
Earned run average5.84
Strikeouts144
Stats at Baseball Reference 
Teams

Jack Von Kochanowicz (ko-HAWN-o-wits; born December 22, 2000) is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB). He made his MLB debut in 2024.

Career

Kochanowicz attended Harriton High School in Rosemont, Pennsylvania. He played for the travel club Houston Banditos after his freshman season.1 He was drafted by the Los Angeles Angels in the third round, with the 92nd overall selection, of the 2019 MLB draft.23 Kochanowicz did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.4 He made his professional debut in 2021 with the Single-A Inland Empire 66ers, logging a 4–2 record and 6.91 ERA with 73 strikeouts across 20 games (18 starts).5

Kochanowicz returned to Inland Empire in 2022, compiling a 4–4 record and 4.99 ERA with 53 strikeouts over 17 appearances (9 starts).6 He was the California League pitcher of the week in mid-July.7 He split the 2023 campaign between the High-A Tri-City Dust Devils and Double-A Rocket City Trash Pandas. In 21 starts between the two affiliates, Kochanowicz accumulated a 5–5 record and 5.27 ERA with 69 strikeouts across 94 innings pitched.8 On November 13, the Angels added Kochanowicz to their 40-man roster to protect him from the Rule 5 draft.910

Kochanowicz was optioned to the Triple-A Salt Lake Bees to begin the 2024 season.11 On July 11, he was promoted to the major leagues for the first time.12 He threw three innings, yielded five runs on seven hits, hit two batters with pitches, and took a loss against the Seattle Mariners.13 Kochanowicz earned his first MLB victory against the Washington Nationals on August 11.1415

In 2025, Kochanowicz went 3–11 with a 6.81 ERA. His ERA was the highest of any pitcher with at least 110 innings pitched, and his strikeout-to-walk rate and home runs allowed per nine innings were among the worst in the majors.16

Kochanowicz made 13 starts for Los Angeles in 2026, compiling a 2-5 record and 6.19 ERA with 47 strikeouts over 64 innings of work. On June 9, 2026, it was announced that Kochanowicz would require Tommy John surgery, ending his season.17

References

References

  1. Santoliquito, Joseph (May 25, 2019). "Bala Cynwyd's Jack Kochanowicz started Major League journey on his couch with an iPad". PhillyVoice. Retrieved April 14, 2026.
  2. Narducci, Marc (June 4, 2019). "MLB draft: Harriton pitcher Jack Kochanowicz goes in third round to Angels". Inquirer.com. Retrieved November 14, 2025.
  3. DiGiovanna, Mike (May 23, 2023). "Small Tweaks Lead To Big Results For Angels' Jack Kochanowicz". Baseball America. Retrieved December 27, 2025.
  4. Adler, David (June 30, 2020). "2020 Minor League Baseball season canceled". MLB.com. Retrieved December 25, 2025.
  5. "Jack Kochanowicz Stats & Scouting Report". baseballamerica.com. Retrieved September 15, 2024.
  6. "Jack Kochanowicz - Baseball Stats". thebaseballcube.com. Retrieved September 15, 2024.
  7. Los Angeles Angels 2026 Media Guide. pp. 121, 122.
  8. "Jack Kochanowicz - Stats - Pitching". fangraphs.com. Retrieved September 15, 2024.
  9. Cooper, J. J.; Pontes, Geoff (November 13, 2023). "MLB 40-Man Roster Deadline: Rule 5 Draft Protection Analysis For Every Team". Baseball America. Retrieved August 19, 2024.
  10. "40-man deadline: Which prospects got roster spots?". MLB.com. November 14, 2023. Retrieved August 19, 2024.
  11. "Angels' Jack Kochanowicz: Optioned to Triple-A". CBS Sports. March 8, 2024. Retrieved November 12, 2025.
  12. Bourandas, Logan (July 11, 2024). "Right-Handed Pitcher Jack Kochanowicz Promoted to Angels". MILB.com. Retrieved August 19, 2024.
  13. Bollinger, Rhett (July 12, 2024). "'Not exactly what I wanted': Kochanowicz struggles in MLB debut". Retrieved August 19, 2024.
  14. Fletcher, Jeff (August 11, 2024). "Rookie Jack Kochanowicz leads Angels to victory over Nationals". Los Angeles Daily News. Retrieved November 6, 2025.
  15. Bollinger, Rhett (August 11, 2024). "'Calm' Kochanowicz nets first MLB win, beer shower". MLB.com. Retrieved August 19, 2024.
  16. "Leaders - 2025". FanGraphs.
  17. "Jack Kochanowicz To Undergo Tommy John Surgery". mlbtraderumors.com. Retrieved June 9, 2026.
External links