 Grimsby was to be his first professional football club in two years.Despite being offered a contract, Marcelle found it extremely hard to break into the team and was often looked past in favour for Michael Reddy, Andy Parkinson and Darren Mansaram, and would often find it very difficult on winning a place on the substitute bench.Marcelle made his only start for the Mariners against Carlisle United in the Football League Trophy, and following only four other sub appearances, Marcelle would not play again for Grimsby.