PORSCHE RACING HISTORYGrady Clay (USA)
1982
31 January 1982 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 72 | Porsche 911 Carrera RSR | GTO | Jean Kjoller (USA)/Bob Nikel (USA)/Grady Clay (USA) | Carrera Motorsports | 22nd | 10th | 66th | 529 laps |
20 March 1982 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTP | Ray Ratcliff (USA)/Grady Clay (USA)/Skeeter McKitterick (USA) | Garretson Development (USA) | 7th | 5th | 9th | 224 laps |
25 April 1982 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTP | Ray Ratcliff (USA)/Grady Clay (USA) | Garretson Development (USA) | 5th | 5th | 14th | 182 laps |
16 May 1982 - Charlotte 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTP | Grady Clay (USA)/Ray Ratcliff (USA) | Garretson Development (USA) | 4th | 4th | 6th | 132 laps |