Jack Ralston

Jack Ralston
Ralston with the Springfield Cardinals in 2023
Miami Marlins – No. 79
Pitcher
Born: (1997-08-13) August 13, 1997
Panorama City, California, U.S.
Bats: Right
Throws: Right
MLB debut
August 23, 2026, for the Miami Marlins
MLB statistics
(through August 29, 2026)
Win–loss record0–0
Earned run average0.00
Strikeouts3
Teams

Jack William Ralston (born August 13, 1997) is an American professional baseball pitcher for the Miami Marlins of Major League Baseball (MLB).

Amateur career

Ralston attended William S. Hart High School in Newhall, California where he played baseball and had a 1.16 earned run average (ERA) as a junior in 2014 and a 2.06 ERA with 72 strikeouts as a senior in 2015.[1]

During the summer of 2015, Ralston played for the La Crosse Loggers of the Northwoods League. He was redshirted as a freshman at the University of California, Los Angeles (UCLA) in 2016, and then returned to the Loggers that summer. He also did not appear in a game for UCLA in 2017, although he did once again play collegiate summer baseball that summer, this time with the Chico Heat of the Great West League.[2] Ralston made his first appearance with UCLA in 2018.[3] He pitched in 14 games (nine starts) and had a 1-4 win-loss record, a 6.44 ERA, and 18 strikeouts across 36+1⁄3 innings pitched.[4] During the summer of 2018, he played in the Cape Cod Baseball League with the Wareham Gatemen.[5] With UCLA in 2019, Ralston had an 11-1 record with a 2.66 ERA across 17 starts.

Professional career

St. Louis Cardinals

Ralston was selected by the St. Louis Cardinals in the seventh round of the 2019 Major League Baseball draft.[6] He made his professional debut with the Class A Short Season State College Spikes and had a 1.07 ERA across 17 relief appearances.[7] He spent the next six years in the Cardinals system playing in the minor leagues, including spending parts of the 2023, 2024, and 2025 seasons with the Double-A Springfield Cardinals.[8][9] In 2025, he also made his Triple-A debut with the Memphis Redbirds.[10] He elected free agency after the 2025 season.[11]

Miami Marlins

On December 16, 2025, Ralston signed a minor league contract with the Miami Marlins and was then assigned to the Triple-A Jacksonville Jumbo Shrimp to begin the 2026 season.[12] On August 4, 2026, the Marlins added Ralston to their 40-man roster and optioned him back to Jacksonville.[13] Across 39 appearances for Jacksonville, Ralston had a 6-2 record, a 1.66 ERA and 75 strikeouts across 59+2⁄3 innings.[14] On August 23, Ralston was promoted to the major leagues for the first time.[15] He made his MLB debut that day versus the Washington Nationals and pitched two scoreless innings in relief while recording two strikeouts with the first of his MLB career being of Nasim Nuñez.[16]

References

  1. ↑ Barnes, Evan (June 24, 2015). "Hart's Jack Ralston leads 2015 Daily News All-Area Baseball Team". Daily News. Retrieved 2026-06-04.
  2. ↑ "Jack Ralston (player profile)". uclabruins.com. Retrieved August 24, 2026.
  3. ↑ "The Jack Ralston story is one of the keys to UCLA's baseball success". Los Angeles Times. May 30, 2019. Retrieved 2026-06-04.
  4. ↑ "UCLA baseball brings nation's best pitching into the postseason". Los Angeles Times. May 31, 2019. Retrieved 2026-08-29.
  5. ↑ "Cardinals complete Day 2 OF 2019 MLB Draft". MLB.com. Retrieved 2026-06-04.
  6. ↑ Lovi, Dan (June 4, 2019). "Hart alumnus Jack Ralston picked by St. Louis in MLB Draft". Santa Clarita Valley Signal. Retrieved 2026-06-04.
  7. ↑ "These Draft picks are off to fast starts". MLB.com. Retrieved 2026-06-04.
  8. ↑ Scranton, Lyndal (June 4, 2025). "Versatile Cardinals reliever Jack Ralston is making a strong case for a promotion". Springfield Daily Citizen. Retrieved 2026-06-04.
  9. ↑ Scranton, Lyndal (August 21, 2024). "Visit from Cardinals Hall of Fame reliever helps Springfield's Jack Ralston turn his season around". Springfield Daily Citizen. Retrieved 2026-06-04.
  10. ↑ "2019 Spikes pitcher Jack Ralston becomes 77th Spike to the Majors". www.mlbdraftleague.com. Retrieved 2026-08-29.
  11. ↑ "Cardinals Lose 12 Players to Free Agency In Blow To St. Louis' Depth". St. Louis Cardinals On SI. November 8, 2025. Retrieved 2026-06-04.
  12. ↑ Freeman, Clayton. "Jumbo Shrimp unveil championship banners but lose Opening Day". The Florida Times-Union. Retrieved 2026-06-04.
  13. ↑ "Marlins' Jack Ralston: Added to 40-man roster, optioned". CBS Sports. August 4, 2026. Retrieved 2026-08-12.
  14. ↑ "Former Jumbo Shrimp reliever Ralston makes MLB debut". MiLB.com. Retrieved 2026-08-29.
  15. ↑ "Marlins Designate John King For Assignment". mlbtraderumors.com. Retrieved August 23, 2026.
  16. ↑ "Former Jumbo Shrimp reliever Ralston makes MLB debut". MLB.com. Retrieved 2026-08-24.
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