| From | Team | Fee | Apps | Goals | To | |
|---|---|---|---|---|---|---|
| 1995 | Bayer 04 Leverkusen | - | 26 | 0 | 1999 | (Player) |
| 1997 | Vfl Wolfsburg | Loan | 48 | 6 | 1999 | (On loan) |
| 1999 | Rangers | £2,000,000 | 64 | 10 | 2001 | (Player) |
| 2001 | Sunderland | £4,000,000 | 28 | 3 | 2003 | (Player) |
| 2003 | Manchester City | £2,500,000 | 77 | 4 | 2007 | (Player) |
| 2007 | New York Red Bulls | - | 29 | 0 | 2008 | (Player) |