Pos	Class	Date	Race	Entrant / Team	Chassis	Championship
DNF	Gr.4	1977-07-09	X Watkins Glen 6 hours	Mike Tillson Enterprises S	Porsche 934	World Sportscar
4	Gr.4	1976-07-10	IX Watkins Glen 6 hours	Mike Tillson	Porsche 911 Carrera RSR	World Sportscar
9	GTO	1975-02-01	X Daytona 24 hours	Mike Tillson	Porsche 911 Carrera RSR	World Sportscar
DNF	GT	1974-07-13	VII Watkins Glen 6 hours	Mike Tillson	Porsche 911 Carrera RSR	World Sportscar
DNQ	GT	1973-07-21	VI Watkins Glen 6 hours	Holbert Racing S	Porsche 911S	World Sportscar
DNF	GT	1973-02-03	VIII Daytona 24 hours	Holbert Racing S	Porsche 911S	World Sportscar
DNQ	GT	1972-07-22	V Watkins Glen 6 hours	Holbert Racing S	Porsche 911 Turbo	World Sportscar
10	GT	1972-03-25	XX Sebring 12 hours	Holbert Racing S	Porsche 911 Turbo	World Sportscar
8	Touring	1970-03-21	XVIII Sebring 12 hours	Texas Speed Museum S	Lancia Fulvia HF	World Sportscar
7	P2.0	1969-03-22	XVII Sebring 12 hours	Algar Enterprises Inc. S	Lancia Fulvia HF Zagato	World Sportscar

No Fastest Laps

No Pole Positions

Position	Championship	Year
31	IMSA SportsCar	1976