War Admiral
Busher was sired by War Admiral, who won the American Triple Crown in 1937. War Admiral was sired by the great Man o' War and inherited much of his sire's racing ability. Physically though, War Admiral was on the small side and more closely resembled his dam Brushup and her sire Sweep. War Admiral led the North American sire list in 1945 and was the leading broodmare sire in 1962 and 1964. Bradley did not like horses descended from Hastings as he felt that many had bad temperaments. His bloodstock advisor, Olin Gentry, convinced him that War Admiral was an exception, pointing to his resemblance to Sweep.