Prior to Stanford
- A 2025 graduate of Delta High School in Delta, Ohio
- No. 196 on MatScouts
- Previously ranked top 20 at 120
- Three-time state champion (2023, 2024, 2025)
- Four-time state finalist (2022, 2023, 2024, 2025)
- Four-time team captain
- Team won 2024 State Championship
- Finished as State runners-up in 2025
- Also lettered in golf
- Three-time team captain
Personal
- Parents are Michael and Leigh Mattin
- Has four older brothers, Drew, Cole and Zack, who all wrestled at Michigan
- Full name is Adam Foster Mattin