Buckpasser was a bay colt that was bred and owned by Ogden Phipps and foaled at Claiborne Farm in Paris, Kentucky. He was by the Horse of the Year-winner Tom Fool, and his dam was the stakes-winning mare Busanda, by the Triple Crown-winner War Admiral. Busanda's second dam was the "blue hen" broodmare La Troienne (FR). He was a half-brother to several other horses that included the stakes-winners Bupers (won $221,688) and Bureaucracy ($156,635). Buckpasser was inbred in the fourth generation (4m x 4f) to the French racehorse and influential sire Teddy.