Prior to Stanford
- A 2023 graduate of Madison Lafollette High School in Madison, Wis.
- Three-year letterwinner
- 2022 state champion at 220 pounds
- Placed third in 2023 at 285 pounds
- Also lettered three times in track and twice in football
Personal
- Parents are James Mankowski and Melissa Colby
- Has one brother, Truman
- Full name is Jackson Colby Mankowski