sentences:  Martin began his career as a trainee with Derby County in July 2002, having graduated from Derby's academy and captained Derby's Under-18 team to the quarter-finals of FA Youth Cup.He joined Notts County on a free transfer in July 2005, where he made 51 appearances, scoring eight goals, in two seasons.Martin was one of six players released by manager Steve Thompson at the end of the 2006–07 season, after which he signed for fellow League Two side Mansfield Town in June 2007.