Cohen, however struggled to make an impact on the first team and was loaned to Northern Premier League side Workington in the 2004–05 season where he found the net twenty times and finished as the club's top scorer, helping them to gain promotion to the Conference North.
In June 2005 he became one of the first new signings of the 2005–06 season for Grimsby Town joining Terry Barwick, Jermaine Palmer and John Lukic as the first new additions.
Primarily used as a forward at his previous clubs, Cohen became a makeshift right and left sided midfielder and his performances soon earned him a permanent deal when he was signed for an undisclosed fee in February 2006.
He was also part of the side that lost the League Two Play-off final against Cheltenham Town which condemned Grimsby to a third successive season in the fourth tier of English football.
He began writing a blog on his progress,[4] and made his debut in the Ford CC Dunton Summer Series Round 7 race in which he finished in 47th place.