PORSCHE RACING HISTORYBob Garretson (USA)
1980 : Riverside 5 Hours - 2nd overall : Watkins Glen 6 Hours - 1st in class : Road America 500 Miles - 3rd overall
3 February 1980 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 | 009 00030 | GTX | Skeeter McKitterick (USA)/Bob Garretson (USA)/Anny-Charlotte Verney (F) | Dick Barbour Racing (USA) | 9th | 5th | 12th | 599 laps |
22 March 1980 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTX | Bob Garretson (USA)/Bobby Rahal (USA)/Kees Nierop (CDN) | Dick Barbour Racing (USA) | 7th | 6th | 6th | 227 laps |
27 April 1980 - Riverside 5 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTX | Bobby Rahal (USA)/Bob Garretson (USA) | Dick Barbour Racing (USA) | 2nd | 2nd | 4th | 162 laps |
15 June 1980 - Le Mans 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 71 | Porsche 935 K3 | 009 00030 | IMSA | Bobby Rahal (USA)/Allan Moffat (AUS)/Bob Garretson (USA) | Dick Barbour (USA) | DNF | 14th | 134 laps - Piston |
5 July 1980 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 36 | Porsche 934 | 930 670 0167 | GT | Bruce Jenner (USA)/Chester Vincentz (USA)/Bob Garretson (USA) | Electrodyne Racing (USA) | 18th | 1st | 32nd | 102 laps |
5 July 1980 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 71 | Porsche 935 K3 | 009 00030 | Gr.5 | Bobby Rahal (USA)/Jürgen Barth (D)/Bob Garretson (USA) | Dick Barbour Racing (USA) | 38th | 1st | 6 laps - Engine |
17 August 1980 - Mosport 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 9 | Porsche 935 K3 | 009 00030 | GTX | Bobby Rahal (USA)/Bob Garretson (USA) | Dick Barbour Racing/Apple Computers (USA) | 25th | 14th | 2nd | 98 laps - Spin |
31 August 1980 - Road America 500 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) | Dick Barbour Racing (USA) | 3rd | 3rd | 1st | 122 laps |