Racing & Rally Winners Database
Racing & Rally Winners Database
Mark Donohue
| Round | Circuit | Date | Winner | Vehicle * | Entrant |
|---|---|---|---|---|---|
| 1 |  Mosport Park | 1973.06.10 | Porsche 917/10 | Rinzler Motorracing Royal Crown | |
| 2 | Road Atlanta | 1973.07.08 | Porsche 917/10 | Rinzler Motorracing Royal Crown | |
| 3 | Watkins Glen | 1973.07.22 | Porsche 917/30 | Roger Penske Enterprises | |
| 4 | Mid-Ohio Sports Car Course | 1973.08.12 | Porsche 917/30 | Roger Penske Enterprises | |
| 5 | Road America | 1973.08.26 | Porsche 917/30 | Roger Penske Enterprises | |
| 6 | Edmonton Indy | 1973.09.16 | Porsche 917/30 | Roger Penske Enterprises | |
| 7 | Laguna Seca | 1973.10.14 | Porsche 917/30 | Roger Penske Enterprises | |
| 8 | Riverside | 1973.10.29 | Porsche 917/30 | Roger Penske Enterprises |