| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 2003 | Leeds United | - | 3 | 0 | 2005 | (Player) |
| 2005 | Liverpool | £750,000 | 4 | 0 | 2008 | (Player) |
| 2006 | Sheffield Wednesday | Loan | 9 | 0 | 2006 | (On loan) |
| 2006 | Charlton Athletic | Loan | 36 | 0 | 2007 | (On loan) |
| 2007 | Aston Villa | Loan | 35 | 0 | 2008 | (On loan) |
| 2008 | West Bromwich Albion | £3,250,000 | 110 | 0 | 2011 | (Player) |
| 2011 | Bursaspor | £2,100,000 | 29 | 0 | 2013 | (Player) |
| 2013 | Wigan Athletic | - | 50 | 0 | 2015 | (Player) |
| 2015 | Derby County | - | 158 | 0 | 2021 | (Player) |
| 2019 | Manchester City | Loan | 0 | 0 | 2020 | (On loan) |
| 2020 | Manchester City | Loan | 1 | 0 | 2021 | (On loan) |
| 2021 | Manchester City | Free | 0 | 0 | 2025 | (Player) |