 The sending off meant he was suspended for the remainder of the month loan spell and the Wrexham game would be his last for Chester.On 8 September 2006 Ravenhill and fellow Doncaster player Nick Fenton moved to Grimsby Town on free transfers.Ravenhill made his Mariners debut the following day in a 2–1 victory at home to Walsall, on 29 September he scored his first goal in a 2–2 draw away at Darlington.