PORSCHE RACING HISTORY917 PA
1972
15 October 1972 - Can-Am Laguna Seca - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917 PA | 917-028 | Sam Posey (USA) | Vasek Polak Racing | 5th | 13th | 85 laps |
29 October 1972 - Can-Am Riverside - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 20 | Porsche 917 PA/TC | 917-028 | Sam Posey (USA) | Vasek Polak Racing | DNF | 23rd | 31 laps - Gearbox |