Declan departed Runcorn Linnets early in the 2026/2027 season to join Atherton LR, but was te first face Dave Jones brought with him to join Celtic. Dec scored against the Celts on the opening day of 26/27 and was a regular for Runcorn 25/26, having made 46 appearances since joining them in the summer of 2025. Having also played for the likes of Skelmersdale (28 appearance, 4 goals), Bootle (31 appearances, 2 goals) and FC United of Manchester (83 appearances, 12 goals).