PORSCHE RACING HISTORYBob Gregg (USA)
1981
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 43 | Porsche 911 Carrera | GTO | Bob Young (USA)/Len Jones (USA)/Bob Gregg (USA) | Bob Gregg Racing | 27th | 8th | 44th | 446 laps |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 43 | Porsche 911 Carrera | GTO | Bob Gregg (USA)/Bob Young (USA)/Joe Varde (USA) | Bob Gregg Racing | 34th | 14th | 36th | 153 laps - DNF |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 43 | Porsche 911 Carrera | GTO | Bob Gregg (USA)/Len Jones (USA) | Bob Gregg | 20th | 7th | 38th | 162 laps - DNF |
3 May 1981 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 43 | Porsche 911 Carrera | GTO | Bob Gregg (USA) | Bob Gregg | 31st | 15th | 31st | 25 laps - DNF |