PORSCHE RACING HISTORYJochen Mass (B)
1983 : Monza 1000 km - 2nd overall : Nürburgring 1000 km - 1st overall : Spa 1000 km - 1st overall : Fuji 1000 km - 2nd overall : Kyalami 1000 km - 3rd overall
27 February 1983 - Miami GP - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 12 | Porsche 935/81 | JR-002 | GTP | Jochen Mass (B) | John Fitzpatrick Racing (GB) | 8th | 8th | 8th | 27 laps |
10 April 1983 - Monza 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jacky Ickx (B)/Jochen Mass (B) | Rothmans Porsche (D) | 2nd | 2nd | 3rd | 173 laps |
8 May 1983 - Silverstone 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jacky Ickx (B)/Jochen Mass (B) | Rothmans Porsche (D) | DNF | 3rd | 114 laps - Accident |
29 May 1983 - Nürburgring 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jochen Mass (B)/Jacky Ickx (B) | Rothmans Porsche (D) | 1st | 1st | 2nd | 44 laps |
19 June 1983 - Le Mans 24 Hours - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 2 | Porsche 956 | 956-008 | C | Jochen Mass (B)/Stefan Bellof (D) | Rothmans Porsche (D) | DNF | 3rd | 281 laps - Engine |
4 September 1983 - Spa 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jacky Ickx (B)/Jochen Mass (B) | Rothmans Porsche (D) | 1st | 1st | 1st | 144 laps |
2 October 1983 - Fuji 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jacky Ickx (B)/Jochen Mass (B) | Rothmans Porsche (D) | 2nd | 2nd | 2nd | 224 laps |
10 December 1983 - Kyalami 1000 km - World Endurance Championship
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 1 | Porsche 956 | 956-005 | C | Jacky Ickx (B)/Jochen Mass (B) | Rothmans Porsche (D) | 3rd | 3rd | 2nd | 236 laps |