On June 27, 2022, Julian Sayin was announced as one of the quarterbacks to play in the 2024 Polynesian Bowl.
During the 2023 season, Julian Sayin began practicing as an early enrollee with Alabama in preparation for the 2024 Rose Bowl.
In 2023, Julian Sayin participated in the finals of the Elite 11 quarterback competition and was named the tournament's MVP. Sayin also participated in the QB retreat competition in 2023.
On January 19, 2024, Julian Sayin entered the transfer portal following the retirement of Nick Saban.
On January 21, 2024, Julian Sayin announced he was transferring to Ohio State.
On September 7, 2024, Julian Sayin threw his first collegiate touchdown coming into relief against Western Michigan.
In 2024, Julian Sayin was rated a five-star recruit and the second-best quarterback prospect in the 2024 class.
Julian Sayin was announced as one of the quarterbacks to play in the 2024 Polynesian Bowl on June 27, 2022.
Julian Sayin was part of the 2025 College Football Playoff National Championship team.