Career
He is the brother of fellow former football player John Mullin. Born in Burnley to Bernard and Mary Mullin, Mullin started his career with Accrington in 1995, making his first-team debut before being released. He then played for Darwen, Trafford, and spent two-and-a-half years at Clitheroe before joining Radcliffe Borough in the summer of 1998.
Two years later, in August 2000, he rejoined Stanley, newly promoted to the UniBond League Premier Division as champions, for a fee of £15,000, after a bid of £10,000 had been rejected the previous season.
On 14 April 2007, Mullin broke Chris Grimshaw"s record for club appearances for Accrington Stanley with 362 games, in a 4–1 victory against Grimsby Town. He scored the first of Stanley"s four goals during the match.
Mullin rejected the offer to be captain for the day to avoid getting himself into a testimonial mentality. In March 2009, Mullin joined fellow League Two side Bradford City on loan for the rest of the 2008-2009 season, to replace Barry Conlon, who was loaned to Grimsby Town.
Bradford lost 1–0 to Portuguese Vale on Mullin"s debut the following day.
On 31 August 2009 Mullin signed for Morecambe on a one-year deal with option of further year, for an undisclosed fee. On 15 April 2011 Mullin announced his retirement from football.
