| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1993 | Melbourne Knights | - | 48 | 40 | 1995 | (Player) |
| 1995 | Dinamo Zagreb | - | 82 | 40 | 1998 | (Player) |
| 1998 | Celtic | £3,000,000 | 37 | 30 | 2000 | (Player) |
| 2000 | Leeds United | £6,000,000 | 130 | 59 | 2004 | (Player) |
| 2004 | Middlesbrough | £4,500,000 | 72 | 26 | 2007 | (Player) |
| 2007 | Newcastle United | Free | 38 | 7 | 2009 | (Player) |