2009, he suffered a groin injury and was substituted in the 67th minute. After the match, it was announced that Caldwell was eventually sidelined for three months. It wasn't until on 10 April 2010 when he returned to the first team, coming on as an 85th-minute substitute, in a 4–1 win against Hull City. Caldwell was later featured three more matches in the remaining matches of the 2009–10 season, including captaining against Tottenham Hotspur in the last game of the season, as the club were relegated from the Premier League. Having made thirteen appearances and scoring once in all competitions, he was released by Burnley at the end of his contract following the 2009–10 season. Wigan Athletic On 23 August 2010, he signed a one-year deal with Wigan Athletic, again joining up with his brother Gary, having trained with the club earlier this month. He made his debut for Wigan Athletic on 24 August 2010, a day after signing, against Hartlepool United in the League Cup second round match, playing the full 90 minutes in a 3–0 victory. Caldwell made his league debut for the club on 16 October 2010 away against Newcastle United, his former club, at St James Park in a 2–2 draw as Newcastle United came from 2–0 down to gain a point. However, he found himself placed on the substitute bench for most of the season. At times, Caldwell was called up to the starting line–up following Wigan's defensive crisis. For the first time in their professional club career, the Caldwell brothers played together in a centre–back against Arsenal on 22 January 2011, in a 3–0 loss. They later played together on two occasions, coming against West Bromwich Albion and Bolton Wanderers. At the end of the 2010–11 season, he went on to make fifteen appearances in all competitions. Following this, Caldwell was released when his contract expired at the end of the season. Birmingham City On 7 July 2011, Caldwell signed a two-year contract with Birmingham City, newly relegated to the Championship. He made his debut for the club on the opening day of the 2011–12 Football League Championship season, playing the whole of a 2–1 defeat at Derby County. He came close to opening the scoring in the Europa League play-off round first leg against Portuguese club Nacional, the first time that Birmingham had participated in major European competition for nearly 50 years, when