He moved up the ranks at Walsall to become a regular in the reserve team throughout 2004–05 and was allowed to join Danish side Køge BK on loan towards the end of the campaign, where he played twice under Gregor Rioch.

He played in three games for the Pitmen, against Hucknall Town, Stafford Rangers and Lancaster City, before injury put an end to his loan spell at Keys Park.

He returned to Walsall and was put on a short-term contract for the 2006–07 season, where he earned his place in the starting line-up with a number of excellent performances at the back.

His form in League One was equally as impressive as the previous season, so it was little surprise that in January 2008 Dann joined Coventry City for an undisclosed fee, suggested in the media to be "in excess of £1 million".

[6] His impressive form for the Saddlers continued in the Championship for the Sky Blues alongside former Walsall teammate Daniel Fox, who had also moved to the Ricoh Arena.

[9][10][11] Surgery during the summer and then a pulled thigh muscle meant Dann was not fully match fit when an injury to Franck Queudrue gave him the chance to make his Premier League debut on 19 September at Hull City.

On 31 August 2011, the last day of the transfer window, Blackburn Rovers signed Dann on a four-year deal for an officially undisclosed fee, reported by BBC Sport as £6 million.

[26] On 11 September, he made his debut in a 1–1 draw with Fulham at Craven Cottage, starting alongside Christopher Samba and completing the full 90 minutes as Rovers earned their first point of the season.

[27] During the 2–1 home defeat to West Bromwich Albion in December, Dann scored his first goal for Rovers, but also suffered a ruptured testicle, an injury which was expected to keep him out for six weeks.

[28] At the end of the 2011–12 season, Dann made a total of 28 appearances in all competitions and also suffered relegation for the third time in his career as Rovers finished in 19th place in the Premier League.