John Michael Mullin (born 11 August 1975) is an English former professional footballer who played as a midfielder for clubs including Sunderland, Burnley, Rotherham United, Tranmere Rovers, and Accrington Stanley, and is the brother of former Accrington and Morecambe player Paul Mullin.
His career began at Burnley, and has taken in spells at Sunderland (where he had the distinction of scoring the winning goal in a Premier League game against Manchester United in 1997, and the final goal at Roker Park in a 1–0 victory over Liverpool[2]), a second spell at Burnley and Rotherham United.
Mullin left Rotherham at the end of the 2005–06 season and joined the manager that brought him to the Millers, Ronnie Moore, at Tranmere Rovers on a two-year deal.
After being released by Tranmere at the end of the 2007–08 season, Mullin was signed by Accrington Stanley on a one-year contract rolling into a second year.
After retiring he joined Burnley's youth set up as a coach before moving onto Manchester City.