Dylan joined the Academy at age 7 during the pre-academy years. The Caerphilly-based centre back has represented Wales consistently across all ages and has captained the team at U16 level. He was part of the 2021 Victory Shield winning squad.

Dylan made his senior debut in a 2-0 defeat to Aston Villa in February 2025, nonetheless impressing against Premier League opposition.

He made his first League start for the Bluebirds in a 2-1 victory over Peterborough United on the opening day of the 2025/26 campaign.