PORSCHE RACING HISTORYMark Donohue (USA)
1973 : Can-Am Road Atlanta - 2nd : Can-Am Watkins Glen - 1st : Can-Am Mid-Ohio - 1st : Can-Am Road America - 1st : Can-Am Edmonton - 1st : Can-Am Laguna Seca - 1st : IROC Riverside 1 - 1st : IROC Riverside 3 - 1st : Can-Am Riverside - 1st
4 February 1973 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera RSR | 911 360 0307 R3 | S3.0 | Mark Donohue (USA)/George Follmer (USA) | Penske Racing (USA) | DNF | 12th | 405 laps - Engine |
10 June 1973 - Can-Am Mosport - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-002 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 7th | 1st | 73 laps |
8 July 1973 - Can-Am Road Atlanta - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 2nd | 1st | 90 laps |
21 July 1973 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 911 Carrera RSR | 911 360 0588 R6 | S3.0 | Mark Donohue (USA)/George Follmer (USA) | Roger Penske Enterprises (USA) | 6th | 6th | 10th | 178 laps |
22 July 1973 - Can-Am Watkins Glen - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-002 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 60 laps |
12 August 1973 - Can-Am Mid-Ohio - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 84 laps |
26 August 1973 - Can-Am Road America - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 25 laps |
16 September 1973 - Can-Am Edmonton - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 50 laps |
14 October 1973 - Can-Am Laguna Seca - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 66 laps |
27 October 1973 - IROC Riverside 1 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 911 Carrera RSR | 911 460 0025 | Mark Donohue (USA) | Roger Penske (USA) | 1st | 1st | 30 laps |
27 October 1973 - IROC Riverside 2 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 911 Carrera RSR | 911 460 0037 | Mark Donohue (USA) | Roger Penske (USA) | 12th | 12th | 9 laps - Throttle Linkage |
28 October 1973 - IROC Riverside 3 - IROC - International Race of Champions
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 911 Carrera RSR | 911 460 0124 | Mark Donohue (USA) | Roger Penske (USA) | 1st | 1st | 30 laps |
29 October 1973 - Can-Am Riverside - Can-Am - Canadian-American Challenge Cup
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 917/30 TC | 917/30-003 | Mark Donohue (USA) | Penske-Roger Enterprises, Inc. | 1st | 1st | 49 laps |