PORSCHE RACING HISTORYM. L. Speer (USA)
1984
24 March 1984 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 24 | Porsche 935 JLP-2 | 009 00043 | GTP | M. L. Speer (USA)/Jack Griffin (USA) | Pegasus Racing (USA) | 50th | 18th | 31st | 96 laps - Gearbox |
26 August 1984 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 24 | Porsche 935 JLP-2 | 009 00043 | GTP | M. L. Speer (USA)/Jack Griffin (USA) | Pegasus Racing (USA) | 38th | 18th | 30th | 68 laps - DNF |