PORSCHE RACING HISTORYTom Masterson (USA)
1978
4 June 1978 - Trans-Am Westwood - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 S | TA-II | Tom Masterson (USA) | Swag Engineering (USA) | 14th | 5th | 24th | 48 laps |
8 October 1978 - Trans-Am Laguna Seca - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 | TA-II | Tom Masterson (USA) | Swag Engineering (USA) | 29th | 11th | 36th | 35 laps |
5 November 1978 - Trans-Am Mexico - Trans-Am
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 26 | Porsche 911 | TA-II | Tom Masterson (USA) | Swag Engineering (USA) | 19th | 10th | 23rd | 26 laps |