Prior to Ohio State
- Jack comes to Ohio State as one of the most decorated athletes in Winona High School history.
- He is a nine-time Minnesota state champion, including winning the 100 freestyle three consecutive years (2018-19-20) at the MSHSL Class A championships.
- In 2020 he was awarded with the Class A Swim and Dive Athlete of the Year by the state swimming and diving coaches association.
- His school, pool, conference and sectional records include his 21.61 record in the 50 freestyle to break a Winona H.S. record that had stood for 39 years.
- His state titles include winning the 50 free as a junior and two state titles apiece in the 200 and 400 freestyle relays.
- An NISCA All-American.
- He led Winona to team finishes of second, third and fourth at the 2018, 2019 and 2020 MSHSL Class A state championships.