 In addition, Brant was responsible for bringing legendary stallion Mr. Prospector to Claiborne Farm in Paris, KY. Mr. Prospector, who began his stud career in Florida in 1975 went on to be one of the most influential sires in the American Stud-Book since his first runners hit the races in 1978.Brant was the breeder of 1995 Kentucky Derby winner Thunder Gulch.Thunder Gulch is the son of Gulch out of the mare Line of Thunder, who were both owned and bred by Brant.