| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1998 | Barnet | - | 54 | 14 | 2000 | (Player) |
| 2000 | Gillingham | Β£255,000 | 101 | 40 | 2003 | (Player) |
| 2003 | Nottingham Forest | Β£950,000 | 50 | 10 | 2005 | (Player) |
| 2005 | Watford | Β£500,000 | 60 | 24 | 2008 | (Player) |
| 2005 | Leeds United | Loan | 9 | 0 | 2005 | (On loan) |
| 2005 | Watford | Loan | 21 | 12 | 2005 | (On loan) |
| 2008 | Hull City | Loan | 20 | 5 | 2009 | (On loan) |
| 2008 | Wigan Athletic | Β£5,000,000 | 18 | 1 | 2009 | (Player) |
| 2009 | Middlesbrough | Loan | 13 | 2 | 2009 | (On loan) |
| 2010 | Coventry City | Free | 28 | 12 | 2011 | (Player) |
| 2011 | Birmingham City | Free | 67 | 29 | 2014 | (Player) |
| 2013 | Sheffield United | Loan | 8 | 1 | 2013 | (On loan) |