PORSCHE RACING HISTORYMichael Keyser (USA)
1972
6 February 1972 - Daytona 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 16 | Porsche 911 S | GT2.5 | Michael Keyser (USA)/Bob Beasley (USA) | Toad Hall Racing | DNF | 32nd | 50 laps |
28 May 1972 - Nürburgring 1000 km - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 65 | Porsche 911 S | GT+2.0 | Jürgen Barth (D)/Michael Keyser (USA) | Toad Hall Racing (USA) | 13th | 4th | 29th | 37 laps |
11 June 1972 - Le Mans 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 41 | Porsche 911 S | GT | Michael Keyser (USA)/Jürgen Barth (D)/Sylvain Garant (F) | Louis Meznarie (F) | 13th | 6th | 44th | 285 laps |