The 84th Kentucky Derby was run on May 3, 1958. Silky Sullivan was joint favorite with the Jimmy Jones-trained Tim Tam, a dark-bay son of Tom Fool (ranked #11 by Blood-Horse magazine of the 100 best U.S. Thoroughbred racehorses of the 20th century) out of the winning mare Two Lea (ranked #77)—herself a daughter of Bull Lea, Calumet Farm's well-known sire. Bull Lea had already produced three Kentucky Derby winners: Citation in 1948, Hill Gail in 1952, and Iron Liege in 1957.