PORSCHE RACING HISTORYJim Mullen (USA)
1983 : Sebring 12 Hours - 1st overall : Road Atlanta 500 km - 1st in class : Riverside 6 Hours - 1st in class : Charlotte 500 km - 1st in class : Lime Rock 3 Hours - 2nd in class : Sears Point 3 Hours - 3rd in class : Portland 3 Hours - 3rd in class
6 February 1983 - Daytona 24 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Bob Garretson (USA) | Personalized Autohaus (USA) | 9th | 4th | 52nd | 551 laps |
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Kees Nierop (CDN) | Personalized Autohaus (USA) | 1st | 1st | 15th | 231 laps |
10 April 1983 - Road Atlanta 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Personalized Autohaus (USA) | 8th | 1st | 28th | 117 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Kees Nierop (CDN) | Personalized Autohaus (USA) | 5th | 1st | 18th | 181 laps |
15 May 1983 - Charlotte 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Personalized Autohaus (USA) | 5th | 1st | 8th | 133 laps |
30 May 1983 - Lime Rock 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Personalized Autohaus (USA) | 5th | 2nd | 10th | 168 laps |
19 June 1983 - Mid-Ohio 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Kees Nierop (CDN) | WLB Racing (USA) | 24th | 8th | 13th | 166 laps |
3 July 1983 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Wayne Baker Racing (USA) | 18th | 7th | 4th | 56 laps |
24 July 1983 - Sears Point 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Wayne Baker Racing (USA) | 8th | 3rd | 16th | 99 laps |
31 July 1983 - Portland 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA) | Wayne Baker Racing (USA) | 5th | 3rd | 11th | 141 laps |
21 August 1983 - Road America 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 934 | 009 00030 | GTO | Wayne Baker (USA)/Jim Mullen (USA)/Kees Nierop (CDN) | Wayne Baker Racing (USA) | 18th | 5th | 9th | 98 laps |
11 September 1983 - Pocono 500 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 91 | Porsche 934 | 930 890 0014 | GTO | Chester Vincentz (USA)/Jim Mullen (USA) | Electrodyne (USA) | 10th | 4th | 15th | 159 laps |
27 November 1983 - Daytona Finale 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTP | Wayne Baker (USA)/Tom Blackaller (USA)/Jim Mullen (USA) | Wayne Baker Racing (USA) | 30th | 13th | 6th | 75 laps |