| Date | Place |
Division |
Start |
Finish | Owner |
# |
Car | Laps | Money | Status | Laps Led |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar 5 1989 | Bicentennial Park | IMSA GTO/GTU/AC | 23 | 42 | Osterholt Racing | 20 | Chevrolet Beretta | 1 | rear end | ||
| May 21 1989 | Summit Point Raceway | IMSA GTO/GTU/AC | 26 | 15 | Osterholt Racing | 20 | Chevrolet Beretta | 83 | running | ||
| Jun 25 1989 | Mosport International Raceway | IMSA GTO/GTU/AC | 19 | 10 | Osterholt Racing | 20 | Chevrolet Beretta | 107 | running | ||
| Jul 16 1989 | Road America | IMSA GT | 45 | 31 | Osterholt Racing | 20 | Chevrolet Beretta | 60 | running | ||
| Sep 24 1989 | Watkins Glen International | IMSA GTO/GTU/AC | 15 | 28 | Osterholt Racing | 20 | Chevrolet Beretta | 30 | mechanical | ||
| Sep 30 1989 | Lime Rock Park | IMSA GTO/GTU/AC | 31 | 24 | Osterholt Racing | 20 | Chevrolet Beretta | 92 | electrical | ||
| Feb 25 1990 | Bicentennial Park | IMSA GTO/GTU | 27 | 19 | Osterholt Racing | 20 | Chevrolet Beretta | 23 | running | ||
| Apr 21 1990 | Long Beach Street Circuit | IMSA GTO/GTU/AAC | 24 | 21 | Osterholt Racing | 20 | Chevrolet Beretta | 26 | mechanical | ||
| May 5 1990 | Heartland Park | IMSA GTO/GTU/AAC | 26 | 21 | Dan Osterholt | 20 | Chevrolet Beretta | 47 | engine | ||
| Jun 3 1990 | Mid-Ohio Sports Car Course | IMSA GTO/GTU/AAC | 24 | 36 | Dan Osterholt | 20 | Chevrolet Beretta | 21 | engine | ||
| Jun 24 1990 | Mosport International Raceway | IMSA GTO/GTU/AAC | 14 | 26 | Osterholt Racing | 20 | Chevrolet Beretta | 11 | mechanical | ||
| Jul 14 1990 | Meadowlands Sports Complex | IMSA GTO/GTU/AAC | 20 | 15 | Osterholt Racing | 20 | Chevrolet Beretta | 52 | running | ||
| Aug 19 1990 | Road America | IMSA GTO/GTU/AAC | 34 | 30 | Dan Osterholt | 20 | Chevrolet Beretta | 17 | 750 | engine | |
| Sep 2 1990 | San Antonio Street Course | IMSA GTO/GTU/AAC | 21 | 23 | Osterholt Racing | 20 | Chevrolet Beretta | 30 | mechanical | ||
| Sep 23 1990 | Watkins Glen International | IMSA GTO/GTU/AAC | 17 | 31 | Osterholt Racing | 20 | Chevrolet Beretta | 36 | engine | ||
| Sep 29 1990 | Lime Rock Park | IMSA GTO/GTU/AAC | 22 | 13 | Osterholt Racing | 20 | Chevrolet Beretta | 88 | running | ||
| Mar 3 1991 | South Florida Fairgrounds | IMSA American Challenge | 6 | 12 | Moser Engineering | 20 | Chevrolet Beretta | 0 | engine | ||
| Apr 6 1991 | Bicentennial Park | IMSA GTO/GTU/AAC | 27 | 30 | Moser Engineering | 20 | Chevrolet Beretta | 22 | mechanical | 0 | |
| May 20 1991 | Mosport International Raceway | IMSA GTO/GTU/AAC | 10 | 15 | Moser Engineering | 20 | Chevrolet Beretta | 59 | 2,000 | running | |
| Jun 1 1991 | Mid-Ohio Sports Car Course | IMSA GTO/GTU/AAC | 31 | 22 | Moser Engineering | 20 | Chevrolet Beretta | 34 | 750 | mechanical | |
| Jun 15 1991 | New Orleans Street Circuit | IMSA GTO/GTU/AAC | 29 | 26 | Moser Engineering | 20 | Chevrolet Beretta | 28 | 750 | accident | |
| Aug 25 1991 | Road America | IMSA GTO/GTU/AAC | 25 | 30 | Moser Engineering | 40 | Chevrolet Beretta | 7 | 750 | suspension | |
| Sep 1 1991 | Road Atlanta | IMSA GTO/GTU/AAC | 15 | 22 | Moser Engineering | 20 | Chevrolet Beretta | 27 | 750 | mechanical | |
| Sep 22 1991 | Watkins Glen International | IMSA GTO/GTU/AAC | 16 | 20 | Moser Engineering | 20 | Chevrolet Beretta | 55 | 1,500 | engine | |
| Sep 28 1991 | Lime Rock Park | IMSA GTO/GTU/AAC | 16 | 18 | Moser Engineering | 20 | Chevrolet Beretta | 73 | 2,000 | mechanical | |
| May 18 1992 | Mosport International Raceway | IMSA GTS/GTO/GTU | 10 | 7 | Ostereholt Racing | 20 | Oldsmobile Cutlass | 74 | running | ||
| May 30 1992 | Mid-Ohio Sports Car Course | IMSA GTS/GTO/GTU | 19 | 24 | Ostereholt Racing | 20 | Oldsmobile Cutlass | 30 | running | 0 | |
| Jun 14 1992 | New Orleans Street Circuit | IMSA GTS/GTO/GTU | 17 | 18 | Ostereholt Racing | 20 | Oldsmobile Cutlass | 26 | running | ||
| Aug 9 1992 | Road America | IMSA GTS/GTO/GTU | 27 | 31 | Ostereholt Racing | 20 | Oldsmobile Cutlass | 0 | mechanical | ||
| Sep 26 1992 | Lime Rock Park | IMSA GTS/GTO/GTU | 31 | 30 | Ostereholt Racing | 20 | Oldsmobile Cutlass | 16 | mechanical | ||
| Feb 21 1993 | Bicentennial Park | IMSA GTS/GTO/GTU | 19 | 11 | 20 | Oldsmobile Cutlass | 26 | running | |||
| Jun 12 1993 | Mid-Ohio Sports Car Course | IMSA GTS/GTO/GTU | 20 | 14 | 20 | Oldsmobile Cutlass | 35 | running | |||
| Jun 27 1993 | Watkins Glen International | IMSA GT | 21 | 15 | 20 | Oldsmobile Cutlass | 53 | running | |||
| Jul 11 1993 | Road America | IMSA GT | 27 | 37 | 20 | Oldsmobile Cutlass | 21 | transmission | |||
| Aug 7 1993 | Watkins Glen International | SCCA Trans Am | 29 | 22 | 20 | Oldsmobile Cutlass | 41 | 600 | running | 0 | |
| Apr 17 1994 | Road Atlanta | IMSA GTS/GTU/GTU | 22 | 39 | Dan Osterholt | 20 | Oldsmobile Cutlass | 1 | mechanical | ||
| May 30 1994 | Lime Rock Park | IMSA GTS/GTO/GTU | 20 | 17 | Dan Osterholt | 20 | Oldsmobile Cutlass | 52 | running | ||
| Jun 26 1994 | Watkins Glen International | IMSA GT | 24 | 13 | Dan Osterholt | 0 | Oldsmobile Cutlass | 73 | running | ||
| Jul 10 1994 | Indianapolis Raceway Park | IMSA GTS/GTO/GTU | 16 | 26 | Dan Osterholt | 0 | Oldsmobile Cutlass | 10 | mechanical | ||
| Jul 24 1994 | Laguna Seca Raceway | IMSA GTS/GTO/GTU | 15 | 30 | Dan Osterholt | 0 | Oldsmobile Cutlass | 15 | drive shaft | ||
| Aug 7 1994 | Portland International Raceway | IMSA GTS/GTO/GTU | 21 | 18 | Dan Osterholt | 0 | Oldsmobile Cutlass | 35 | running | ||
| Apr 30 1995 | Road Atlanta | IMSA GT | 17 | 30 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 40 | mechanical | ||
| May 21 1995 | Halifax Street Circuit | IMSA GT | 14 | 12 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 98 | running | ||
| May 29 1995 | Lime Rock Park | IMSA GTS-1/GTS-2 | 19 | 11 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 51 | running | ||
| Oct 8 1995 | New Orleans Street Circuit | IMSA World Sports Car/GTS-1 | 17 | 10 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 66 | 3,500 | running | |
| Apr 21 1996 | Road Atlanta | IMSA World Sports Car/GTS-1 | 18 | 22 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 43 | accident | ||
| May 27 1996 | Lime Rock Park | IMSA World Sports Car/GTS-1 | 18 | 11 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 88 | running | ||
| Aug 25 1996 | Mosport International Raceway | IMSA GT | 19 | 23 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 47 | 2,750 | mechanical | 0 |
| Oct 6 1996 | Daytona International Speedway | IMSA GT | 42 | 54 | Dan Osterholt | 21 | Oldsmobile Cutlass Supreme | 10 | clutch | ||
| Jun 6 1998 | The Raceway at Belle Isle | SCCA Trans Am | 26 | 27 | 20 | Oldsmobile Cutlass | 9 | mechanical | 0 | ||
| Jul 11 1998 | Burke Lakefront Airport | SCCA Trans Am | 31 | 32 | 20 | Oldsmobile Cutlass | 37 | running | 0 |