PORSCHE RACING HISTORYBob Garretson (USA)
1981 : Daytona 24 Hours - 1st overall : Le Mans 24 Hours - 2nd in class : Watkins Glen 6 Hours - 3rd overall : Brands Hatch 1000 km - 2nd overall, 1st in class
1 February 1981 - Daytona 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTX | Bob Garretson (USA)/Bobby Rahal (USA)/Brian Redman (GB) | Garretson Racing/Style Auto (USA) | 1st | 1st | 16th | 708 laps |
21 March 1981 - Sebring 12 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3/80 | 009 00030 | GTX | Bob Garretson (USA)/Bobby Rahal (USA)/Brian Redman (GB) | Cooke Woods/Garretson Enterprises (USA) | 17th | 6th | 4th | 190 laps |
26 April 1981 - Riverside 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 90 | Porsche 935 K3 | 930 770 0911 | GTX | Bob Garretson (USA)/Ralph Kent-Cooke (USA)/Roy Woods (USA) | Bob Garretson Enterprises (USA) | 4th | 4th | 13th | 190 laps |
14 June 1981 - Le Mans 24 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 42 | Porsche 935 K3 | 009 00030 | IMSA | Anny-Charlotte Verney (F)/Ralph Kent-Cooke (USA)/Bob Garretson (USA) | Cooke-Woods Racing (USA) | 6th | 2nd | 33rd | 328 laps |
4 July 1981 - Daytona 250 Miles Paul Revere - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3/80 | 009 00030 | GTX | Bobby Rahal (USA)/Bob Garretson (USA) | Garretson Racing (USA) | 18th | 5th | 10th | 50 laps |
12 July 1981 - Watkins Glen 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3/80 | 009 00030 | Gr.5 | Rick Mears (USA)/Bob Garretson (USA)/Johnny Rutherford (USA) | Garretson Racing (USA) | 3rd | 3rd | 11th | 168 laps |
16 August 1981 - Mosport 6 Hours - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 46 | Porsche 935 J | 000 00012 | GTX | Mauricio DeNarváez (COL)/Bob Garretson (USA) | De Narvaez (CO) | 7th | 6th | 30th | 215 laps |
23 August 1981 - Road America 500 Miles - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3/80 | 009 00030 | GTX | Tom Gloy (USA)/Bob Garretson (USA) | Garretson Racing Style Auto Racing (USA) | 4th | 4th | 10th | 119 laps |
27 September 1981 - Brands Hatch 1000 km - World Championship for Drivers and Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 50 | Porsche 935 K3/80 | 009 00030 | GTX | Bobby Rahal (USA)/Bob Garretson (USA) | Flying Tigers-Garretson Racing (USA) | 2nd | 1st | 6th | 230 laps |
29 November 1981 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTX | Bobby Rahal (USA)/Bob Garretson (USA) | Garretson Racing (USA) | 17th | 9th | 13th | 57 laps |