Mark James Duffy (born 7 October 1985) is an English professional footballer who plays as an attacking midfielder or right winger for club Macclesfield. Duffy began his career with the academies at Liverpool and Wrexham before joining non-league side Vauxhall Motors. From there he went to Prescot Cables and Southport and entered the Football League with Morecambe. He joined Scunthorpe United in January 2011, where he spent two-and-a-half years at Glanford Park and the 2013–14 season at Doncaster Rovers.