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| Transfers |
 Zaragoza 4,750,000 < >  FC Schalke 04 |
| QUA | > | Michael Olabode KAYODE | RB | ITA | 61 | 98 | 10/07/04 (20) | 89 | | | FC Schalke 04 | 6.88 | 9450 | | | | 0 | 0 | 3425 | 0 | +1 | |
| Hannover 96 < > 2,570,000 FC Schalke 04 |
| CNE | < | Marius BÜLTER | W | GER | 62 | 10 | 29/03/93 (31) | 93 | 1.88 | 85 | Hannover 96 | | | | | | | | 2425 | | | |
 Paris SG 15,000,000 < > FC Schalke 04 |
| WPM | > | Maarten VANDEVOORDT | Gk | BEL | 62 | 92 | 26/02/02 (22) | 82 | 1.87 | 71 | FC Schalke 04 | | 10560 | | | | 0 | 0 | 3645 | 0 | +4 | |
 Liverpool 4,000,000 < > Anderlecht |
| GCL | > | Daniel CARVAJAL Ramos | RWB | ESP | 69 | 99 | 18/01/92 (33) | 90 | 1.71 | 73 | Anderlecht | 7.12 | 47280 | | | | 2 | 1 | 2565 | 2 | +4 | |
| Beerschot < > 2,800,000 Anderlecht |
| WXM | < | Jordan TEZE | RB/CB | NED | 63 | 11 | 30/09/99 (25) | 86 | 1.83 | 68 | Beerschot | | | | | | | | 2865 | | | |
| 800,000 < > Paris SG |
| GVO | > | Zepiqueno REDMOND | St | NED | 47 | 97 | 22/06/06 (18) | 83 | | | Paris SG | | 640 | | | | 0 | 0 | 915 | 0 | Y | |
| 450,000 < > Kaiserslautern |
| OUB | > | JESÚS RODRÍGUEZ Caraballo | CM | ESP | 46 | 93 | 21/11/05 (19) | 88 | 1.85 | 68 | Kaiserslautern | | 530 | | | | 0 | 0 | 610 | 0 | Y | |
| 250,000 < > Kaiserslautern |
| PPY | > | Almugera KABAR | LB/LM | GER | 45 | 87 | 06/06/06 (18) | 90 | | | Kaiserslautern | | 470 | | | | 0 | 0 | 370 | 0 | Y | |
| 2,200,000 < > Borussia Dortmund |
| PPT | > | Miliano JONATHANS | RW | NED | 58 | 83 | 05/04/04 (20) | 88 | | | Borussia Dortmund | | 6290 | | | | 0 | 0 | 3275 | 0 | +1 | |
| Loan/transfer listed |
| KMO | - | Jonas HOFMANN | RW/AM | GER | 65 | 91 | 14/07/92 (32) | 91 | 1.76 | 65 | Sporting | 7.11 | 27420 | | | T | 5 | 0 | 2920 | 15 | +3 | |
| Released |
| INO | 25+ | Amario COZIER-DUBERRY | LW/AM | ENG | 41/45 | 9 | 29/05/05 (19) | 71 | | | Arbroath | | | | | | | | 525 | | | |
| EFT | 25+ | Tim DREXLER | CB | GER | 55 | 0 | 06/03/05 (19) | 92 | 1.86 | 75 | FSV Zwickau | | | | | | | | 1570 | | | |
| Loan callbacks |
| MTV | <25 | Arijon IBRAHIMOVIC | CM | GER | 54/55 | 99 | 11/12/05 (19) | 78 | 1.76 | 69 | SC Heerenveen | | 2070 | | | | 0 | 0 | 2305 | 0 | Y | |
| EZM | <10 | Claudio Jeremias ECHEVERRI | AM | ARG | 51/52 | 96 | 02/01/06 (19) | 78 | 1.71 | 62 | SC Heerenveen | | 1320 | | | | 0 | 0 | 1490 | 0 | Y | |
| THS | - | MARCOS LEONARDO Santos Almeida | St | BRA | 62 | 90 | 02/05/03 (21) | 82 | 1.78 | 71 | Deportivo | | 15740 | | | | 3 | 0 | 6215 | 0 | +1 | |
