 In the summer of 2004, Croudson returned to Grimsby to train with the club, who were now under the management of Russell Slade.He would provide cover for Town's new number 1 Anthony Williams as he was named as a substitute for the Town's pre-season friendlies against Gainsborough Trinity and Scarborough.Despite this he failed to make an appearance in either game and failed to earn a contract with The Mariners, with Slade mentioning that the Croudson had only been with the club for a few weeks to keep his fitness levels up.