2012
| | ADAC GT Masters | | Position: no position | 4 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Callaway Competition | | Car: Chevrolet Corvette Z06 |
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2011
| | ADAC GT Masters | | Position: 38 (6 points) | 16 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Callaway Competition | | Car: Chevrolet Corvette Z06.R GT3 |
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2010
| | ADAC GT Masters | | Position: 14 (26 points) | 13 races. 0 wins. 2 pole positions. 3 podiums. 0 fastest laps.
| | Team: Callaway Competition | | Car: Chevrolet Corvette Z06.R GT3 |
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| | | FIA GT3 European Championship | | Position: 11 (51 points) | 8 races. 0 wins. 0 pole positions. 2 podiums. 0 fastest laps.
| | Team: Toni Seiler Racing | | Car: Chevrolet Corvette Z06R GT3 |
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2009
| | ADAC GT Masters | | Position: 4 (57 points) | 14 races. 1 win. 0 pole positions. 4 podiums. 2 fastest laps.
| | Team: Callaway Competition | | Car: Chevrolet Corvette Z06-R |
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2008
| | ADAC GT Masters | | Position: 13 (21 points) | 14 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Toni Seiler Racing | | Car: Corvette |
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2007
| | FIA GT3 European Championship | | Position: 15 (6 points) | 5 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: BMS Scuderia Italia | | Car: Aston Martin DBRS9 |
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| | | ADAC GT Masters | | Position: 6 (46 points) | ? races. ? wins. ? pole positions. ? podiums. ? fastest laps. | | Complete results needed. |
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2006
| | FIA GT3 European Championship | | Position: 5 (26 points) | 9 races. 0 wins. 0 pole positions. 3 podiums. 0 fastest laps.
| | Team: BMS Scuderia Italia | | Car: Aston Martin DBR9 |
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2005
| | Le Mans Series - LMGT1 | | Position: 1 (35 points) | 5 races. 2 wins. 0 pole positions. 4 podiums. 0 fastest laps.
| | Team: BMS Scuderia Italia | | Car: Ferrari 550 Maranello |
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| | | Le Mans 24h - GT1 class | |
| Race position: no position. | | Team: BMS Scuderia Italia | | Car: Ferrari 550 Maranello | | Complete results needed. |
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2004
| | FIA GT | | Position: 37 (7 points) | 10 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Konrad Motorsport | | Car: Saleen S7-R |
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2003
| | FIA GT | | Position: 16 (17 points) | 9 races. 0 wins. 0 pole positions. 1 podium. 0 fastest laps.
| | Team: Konrad Motorsport | | Car: Saleen S7-R |
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2002
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2001
| | FIA GT NGT | | Position: 25 (6 points) | 1 race. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Freisinger Motorsport | | Car: Porsche 911 GT3 R |
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| | | Le Mans 24h - GTS class | |
| Race position: no position. | | Team: Konrad Motorsport | | Car: Saleen S7R (Ford) | | Complete results needed. |
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2000
| | FIA GT | | Position: 24 (4 points) | 5 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Chamberlain Motorsport | | Car: Chrysler Viper GTS-R |
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| | | Le Mans 24h - GTS class | |
| Race position: no position. | | Team: Team Goh / Chamberlain Engineering | | Car: Chrysler Viper GTS-R | | Complete results needed. |
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1999
| | FIA GT | | Position: 12 (14 points) | 5 races. 0 wins. 0 pole positions. 2 podiums. 0 fastest laps.
| | Team: Chamberlain Motorsport | | Car: Chrysler Viper GTS-R |
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| | | Le Mans 24h - GTS class | |
| Race position: 3. | | Team: Hugh Chamberlain Engineering | | Car: Chrysler Viper GTS-R | | Complete results needed. |
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1998
| | FIA GT - GT2 | | Position: 27 (5 points) | 8 races. 0 wins. 0 pole positions. 0 podiums. ? fastest laps. | | Team: Konrad Motorsport | | Car: Porsche 911 GT2 | | Complete results needed. |
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| | | Le Mans 24h - GT2 class | |
| Race position: no position. | | Team: Konrad Motorsport | | Car: Porsche 911 GT2 | | Complete results needed. |
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1997
| | FIA GT - GT2 | | Position: 16 (12 points) | 10 races. 0 wins. 0 pole positions. 1 podium. ? fastest laps. | | Team: Konrad Motorsport | | Car: Porsche 911 GT2 | | Complete results needed. |
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| | | Le Mans 24h - GT2 class | |
| Race position: no position. | | Team: Franz Konrad Motorsport | | Car: Porsche 911 GT2 | | Complete results needed. |
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1996
| | Global GT Championship | | Position: 51 (32 points) | 7 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Konrad Motorsport | | Car: Porsche 911 GT2 |
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| | | Le Mans 24h - GT2 class | |
| Race position: no position. | | Team: Elf Haberthur Racing | | Car: Porsche 911 GT2 | | Complete results needed. |
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1995
| | Global GT Championship | | Position: 22 (73 points) | 4 races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Team: Konrad Motorsport | | Car: Porsche 911 Biturbo | | Car: Porsche 911 GT2 |
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1993
| | Porsche Supercup | | Position: no position | ? races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Car: Porsche Carrera | | Complete results needed. |
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1992
| | Porsche Carrera Cup Germany | | Position: no position | ? races. 0 wins. 0 pole positions. 0 podiums. 0 fastest laps.
| | Car: Porsche Carrera 2 | | Complete results needed. |
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