Ryan Mullen, born on 18 May 2001 (age 25), is a Scottish goalkeeper whose early senior route included a brief Celtic connection before his career settled elsewhere.
He joined Celtic from Cove Rangers in October 2020, then moved on to Clyde in September 2022. Clyde gave him his first league foothold, with three league appearances in the 2022-23 season.
The spell that has shaped his career most clearly came at Greenock Morton. Across two seasons at Cappielow, Mullen made 47 league appearances, far more than at any other club so far, and that is where his senior profile was properly built.
He is now with St Mirren, where in 2025-26 he has made two league appearances and one in the Scottish Cup. His career to date is a straightforward one: an early Celtic stop, a move into senior football with Clyde, a substantial run at Morton, and a current place in the St Mirren squad.