PORSCHE RACING HISTORYJohn Graham (CDN)
1988
3 July 1988 - Watkins Glen 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | Doc Bundy (USA)/John Graham (CDN) | Kalagian Racing | 8th | 8th | 9th | 87 laps |
17 July 1988 - Road America 500 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | Bernard Jourdain (MEX)/John Graham (CDN) | Kalagian Racing | 9th | 9th | 8th | 74 laps |
31 July 1988 - Portland 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | Bernard Jourdain (MEX)/John Graham (CDN) | Kalagian Racing | 9th | 9th | 15th | 93 laps |
14 August 1988 - Sears Point 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | Doc Bundy (USA)/John Graham (CDN) | Kalagian/Interlock | 12th | 12th | 12th | 71 laps |
4 September 1988 - San Antonio 3 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | Doc Bundy (USA)/John Graham (CDN) | Kalagian Racing | 5th | 5th | 17th | 135 laps |
2 October 1988 - Columbus 300 km - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | John Graham (CDN)/Bernard Jourdain (MEX) | Kalagian Racing | 11th | 11th | 13th | 77 laps |
23 October 1988 - Del Mar 2 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 15 | Porsche 962 | 962-HR2 | GTP | John Graham (CDN)/Bernard Jourdain (MEX) | Kalagian Racing | 15th | 11th | 24th | 76 laps |