 Green made his first appearance in a Derby shirt at home to his former club Doncaster Rovers in a 1–0 defeat on 9 August 2008.He scored his first goal for his new club away at Bristol City in a 1–1 draw on 19 August, and grabbed his second in a 1–0 League Cup win at Preston on 26 August.Green established himself well in the Derby side and was the clubs' only remaining ever-present when he played his fourteenth consecutive game, a 3–2 defeat to Blackpool on 21 October.