Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 10/2025 - 06/2027 |  | VfL Bochum |  Germany | Manager |
| 06/2022 - 06/2025 |  | Aarhus GF |  Denmark | Manager |
| 01/2020 - 05/2021 |  | Fortuna Düsseldorf | Germany | Manager |
| 07/2018 - 12/2019 |  | Malmö FF |  Sweden | Manager |
| 07/2016 - 02/2018 |  | Fleetwood Town |  England | Manager |
| 07/2015 - 10/2015 |  | Leeds United | England | Manager |
| 12/2013 - 11/2014 |  | Wigan Athletic | England | Manager |
| 07/2011 - 12/2013 |  | Brentford FC | England | Manager |
| 08/2010 - 11/2010 |  | Molde FK |  Norway | Manager |
| 01/2007 - 11/2009 |  | Viking FK | Norway | Manager |
| 11/2004 - 11/2006 |  | Lillestrøm SK | Norway | Manager |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 07/2002 - 12/2003 | | Lillestrøm SK | Norway | Forward | 24 |
| 01/2002 - 06/2002 |  | SpVgg Unterhaching | Germany | Forward | 29 |
| 12/2001 - 12/2001 |  | Southampton FC | England | Forward | |
| 10/2001 - 11/2001 |  | West Bromwich Albion | England | Forward | |
| 07/2000 - 10/2001 | | Southampton FC | England | Forward | |
| 07/1999 - 06/2000 |  | TeBe Berlin | Germany | Forward | 20 |
| 07/1998 - 06/1999 |  | 1. FC Kaiserslautern | Germany | Forward | 20 |
| 03/1994 - 06/1998 |  | Manchester City | England | Forward | 28 |
| 07/1993 - 02/1994 |  | Dynamo Dresden | Germany | Forward | |
| 07/1992 - 06/1993 |  | 1. FC Nuremberg | Germany | Forward | |
| 01/1991 - 06/1992 | | Dynamo Dresden | Germany | Forward | |
| 03/1989 - 12/1990 |  | 1. FC Magdeburg | Germany | Forward | |
| 04/1988 - 03/1989 |  | SG Sachsen Leipzig | Germany | Forward | |
| 07/1987 - 03/1988 |  | 1. FC Lok Leipzig | Germany | Forward |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League | 8 | 6 | 2 | 4 | 451 | 3 | - | - | 1 | - | - | » All matches |
| Champions League Qual. | 2 | 2 | - | 1 | 117 | - | - | - | - | - | - | » All matches |
| Europa League | 4 | 4 | - | - | 360 | - | - | - | - | - | - | » All matches |
| Cup Winners Cup | 2 | - | 2 | - | 30 | - | - | - | - | - | - | » All matches |
 | Oberliga | 62 | 56 | 6 | 17 | 5.069 | 22 | - | - | 11 | - | - | » All matches |
| DDR-Liga | 28 | 27 | 1 | 5 | 2.307 | 6 | - | - | 2 | - | - | » All matches |
| FDGB-Pokal | 6 | 5 | 1 | - | 464 | 1 | - | - | 1 | - | - | » All matches |
| Bundesliga | 96 | 65 | 31 | 27 | 5.867 | 12 | - | 5 | 11 | 3 | 1 | » All matches |
| 2. Bundesliga | 42 | 37 | 5 | 9 | 3.238 | 11 | - | 3 | 18 | - | 1 | » All matches |
| DFB-Pokal | 11 | 9 | 2 | 3 | 893 | 10 | 2 | 1 | 4 | - | - | » All matches |
| League Cup | 1 | 1 | - | 1 | 46 | - | - | - | - | - | - | » All matches |
| Premier League | 103 | 84 | 19 | 20 | 7.536 | 29 | 1 | 3 | 16 | 1 | - | » All matches |
| Championship | 78 | 71 | 7 | 19 | 6.203 | 22 | 3 | - | 9 | - | - | » All matches |
| FA Cup | 16 | 14 | 2 | 2 | 1.265 | 9 | - | - | - | - | - | » All matches |
| League Cup | 14 | 11 | 3 | 3 | 1.042 | 6 | - | - | - | - | - | » All matches |
| Eliteserien | 11 | 11 | - | 2 | 968 | 10 | - | 2 | 2 | 1 | - | » All matches |
| Total | 484 | 403 | 81 | 113 | 35.856 | 141 | 6 | - | 75 | 5 | 2 |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Friendlies | 5 | 3 | 2 | 1 | 270 | - | - | - | - | - | - | » All matches |
| Total | 5 | 3 | 2 | 1 | 270 | - | - | - | - | - | - | ||
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
| U21 EURO Qualifiers | 3 | 3 | - | 1 | 253 | - | - | - | - | - | - | » All matches |
| Total | 3 | 3 | - | 1 | 253 | - | - | - | - | - | - |