| 2011 | Porsche Works Driver 4th American Le Mans Series Championship (GT class, 1 win) 1st 24H Nürburgring (GTH class) |
|---|---|
| 2010 | Porsche Works Driver 1st American Le Mans Series Championship (GT2 class, 4 wins) 1st 24h Spa (overall classification) 1st Intercontinental Le Mans Cup/Zhuhai (GTH class) 2nd 24h Daytona (GT class) ADAC GT Masters (various races, 1 win) |
| 2009 | Porsche Works Driver Winner American Le Mans Series Championship (GT2 class), 6 wins 1st Daytona 24 Hours (GT class) |
| 2008 | Porsche Works Driver Winner American Le Mans Series Championship (GT2 class), 3 wins 1st Sebring 12 Hours (GT2 class) 2nd Petit Le Mans (GT2 class) |
| 2007 | Porsche Works Driver 2nd Position American Le Mans Series Championship (GT2 class, win at Petit Le Mans ) 1st Position GrandAm Series Laguna Seca (DP class) |
| 2006 | Grand Am Sportscar Series, Daytona Prototypes, driver classification: Champion
American Le Mans Series, GT2, driver classification: Champion |
| 2005 | American Le Mans Series, GT2, driver classification: Champion
Grand Am Sportscar Series, Daytona Prototypes, driver classification: 4th |
| 2004 | Porsche works driver
American Le Mans Series, GT, driver classification: 3rd Sebring 12 Hours, GT: 1st Le Mans 24 Hours, GT: 1st |
| 2003 | Porsche works driver
American Le Mans Series 2nd Daytona 24 Hours, GT: 1st |
| 2002 | Porsche works driver
American Le Mans Series, GT, driver classification: 4th Daytona 24 Hours, GT: 1st |
| 2001 | 1st Porsche Pirelli Supercup Championship (7wins, 8 pole position) Porsche Carrera Cup Deutschland, driver classification: 2nd |
| 2000 | Porsche Carrera Cup Deutschland, driver classification: Champion
Porsche Pirelli Supercup Championship 6th |
| 1999 | Porsche Carrera Cup Deutschland, driver classification: 3rd
Porsche Pirelli Supercup |
| 1998 | Porsche Carrera Cup Deutschland, driver classification: 9th |
| 1997 | Formula Opel, European Championship, driver classification: 6th |
| 1996 | 7th Porsche Carrera Cup Deutschland Championship (2 podiums, 1 pole position) |
| 1995 | Formula Opel, driver classification: 2nd |
| 1994 | Formula Renault (various races) |
| 1993 | Formula König, driver classification: Champion 1st Formula König Championship (3 wins, youngest Formula Champion at age 17) |
| 1992 | Formula König, driver classification: 3rd Formula Motorsport debut |
| 1991 - 1987 | Various German and European Kart championships |