| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1998 | Strasbourg | - | 0 | 0 | 2000 | (Player) |
| 1999 | Neuchatel Xamax | - | 32 | 17 | 2000 | (Player) |
| 2000 | Grasshopper Club Zurich | - | 11 | 3 | 2001 | (Player) |
| 2001 | Sedan | - | 59 | 22 | 2003 | (Player) |
| 2003 | Wolverhampton Wanderers | £1,500,000 | 30 | 7 | 2005 | (Player) |
| 2004 | Celtic | Loan | 18 | 8 | 2005 | (On loan) |
| 2005 | Southampton | Loan | 13 | 4 | 2005 | (On loan) |
| 2005 | Wigan Athletic | £3,000,000 | 69 | 20 | 2009 | (Player) |
| 2007 | West Ham United | Loan | 10 | 0 | 2008 | (On loan) |
| 2009 | Stoke City | Loan | 4 | 0 | 2009 | (On loan) |
| 2009 | Sheffield United | Free | 23 | 4 | 2010 | (Player) |
| 2011 | Panetolikos | - | 102 | 29 | 2014 | (Player) |
| 2014 | Kalloni | - | 13 | 1 | 2015 | (Player) |
| 2015 | Panetolikos | - | 5 | 0 | 2016 | (Player) |
| 2016 | Apollon Kalamarias | - | 13 | 6 | 2016 | (Player) |
| 2016 | Ionikos | - | 23 | 10 | 2017 | (Player) |
| 2017 | Fostiras | - | 2 | 0 | 2018 | (Player) |