Tom Alan Marx (USA)
1985
28 April 1985 - Riverside 600 km - IMSA - International Motor Sport Association
No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
51 | Porsche 911 | GTU | John Winthrop (USA)/Tom Alan Marx (USA)/Larry Amberg (USA) | 24th | 5th | 55th | 95 laps - DNF |