On 12 March 2010, Martin joined Derby County on a month's loan as cover for the injured Stephen Bywater and to play in the match against Doncaster Rovers on 13 March after reserve goalkeeper, Saul Deeney, received a red card during the same match against Reading on 10 March. He kept his place for a 2–2 draw with Middlesbrough but the return of Bywater, combined with the allowance of only five loan players in the match day squad when Derby had six, saw Martin uninvolved with the first team for the remainder of his month at the club. He returned to Liverpool on 12 April 2010.