Career as a coach
| Period | Team | Country | Position | |
|---|---|---|---|---|
| 07/2011 - 04/2012 |  | 1. FC Köln |  Germany | Ass. Coach |
| 01/2009 - 12/2010 |  | Urawa Red Diamonds |  Japan | Ass. Coach |
| 07/2007 - 12/2008 |  | SC Freiburg II | Germany | Ass. Coach |
National teams managed
| Season | Team | Position | |
|---|---|---|---|
| U23 Africa Cup 2023 Marokko |  | Ghana U23 | Manager |
| U23 Africa Cup 2019 Ägypten | | Ghana U23 | Manager |
| Confederations Cup 2017 Russia |  | Cameroon | Ass. Coach |
Career as a player
| Period | Team | Country | Position | # | |
|---|---|---|---|---|---|
| 04/2001 - 06/2007 |  | SC Freiburg | Germany | Forward | 33 |
| 07/1994 - 03/2001 |  | Borussia Dortmund | Germany | Forward | 22 |
| 07/1998 - 09/2000 |  | Borussia Dortmund II | Germany | Forward | |
| 07/1994 - 06/1995 |  | Borussia Dortmund U19 | Germany | Forward | |
| 07/1992 - 06/1994 |  | King Faisal FC | Ghana | Forward |
Club matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Champions League | 6 | 2 | 4 | 2 | 208 | - | - | - | - | - | - | » All matches |
| Europa League | 12 | 6 | 6 | 3 | 549 | 1 | - | - | - | - | - | » All matches |
| UEFA Super Cup | 1 | 1 | - | 1 | 58 | - | - | - | 1 | - | - | » All matches |
| Bundesliga | 109 | 57 | 52 | 36 | 5.219 | 6 | - | 4 | 3 | - | - | » All matches |
| 2. Bundesliga | 49 | 42 | 7 | 26 | 3.315 | 2 | - | 4 | 5 | - | - | » All matches |
| DFB-Pokal | 14 | 10 | 4 | 5 | 899 | 2 | - | - | - | - | - | » All matches |
| Regionalliga Nord | 1 | 1 | - | 1 | 87 | - | - | - | - | - | - | » All matches |
| Regionalliga West/Südwest (1994-2000) | 24 | 24 | - | 12 | 1.923 | 2 | - | - | 5 | - | - | » All matches |
| League Cup | 2 | 1 | 1 | 1 | 97 | - | - | - | - | - | - | » All matches |
| Total | 218 | 144 | 74 | 87 | 12.355 | 13 | - | - | 14 | - | - |
International matches
| Competition | Matches | Start | In | Out | Min. | Scores | 11m | Ass | Yellow | Yellow-Red | Red | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WC Qualifiers Africa | 3 | 3 | - | 3 | 180 | - | - | - | - | - | - | » All matches |
 | Africa Cup | 5 | 2 | 3 | 2 | 174 | - | - | - | - | - | - | » All matches |
| Total | 8 | 5 | 3 | 5 | 354 | - | - | - | - | - | - |