Peter Gregg (GTO)
Bob Bergstrom (GTU)
Maurice Carter (TO)
Dave Nicholas (TU)
John Magee (TU)
Mistrz producentów
Porsche (GTO)
Porsche (GTU)
Chevrolet (TO)
BMW (TU)
| Runda | Tor | Data | Klasa | Kierowca | Pojazd | Zespół |
|---|---|---|---|---|---|---|
| 1 | Sebring Sebring 12 godzin | 1973.03.24 | TU | BMW 2002 |  Jim Grob Racing | |
| 2 | Daytona | 1973.04.21 | TU | BMW 2002 | Jim Grob Racing | |
| 3 | Pocono | 1973.06.10 | TU | Mazda | Z & W Mazda | |
| 4 | Daytona | 1973.07.04 | TU | BMW | | |
| 5 | Mid-Ohio | 1973.07.15 | TU | BMW | Auto Sport by Jiri | |
| 6 | Lime Rock Park | 1973.09.15 | TU | BMW | Auto Sport by Jiri | |
| TU | BMW | John Magee | ||||
| 7 | Road Atlanta | 1973.09.30 | TU | Nikt nie ukończył wyścigu | ||
| 8 | Indianapolis Raceway Park | 1973.10.14 | TU | Mazda | Z & W Mazda | |
| 9 | Daytona | 1973.11.25 | TU | BMW 2002 | | |
