In recent years, Hancock has been a strong supporter of the National Thoroughbred Racing Association. He is a member of The Jockey Club, and a founding member of Breeders' Cup Ltd.
Seth Hancock, president of Claiborne Farm near Paris, Ky., will be the honored guest at the Thoroughbred Club of America's annual testimonial dinner Oct. 15 at Keeneland. Hancock will be the third member of his family to be honored by the TCA; his grandfather, Arthur (Bull) Hancock Sr., was honored in 1944, and his father, Arthur (Bull) Hancock Jr., was honored in 1960. “Since the Thoroughbred Club established this honor in 1932, it has made a point of honoring individuals who, over and above their personal success, have contributed to the best traditions of racing and breeding, as well as to the sport's overall health,” TCA president Reynolds Bell said. Seth Hancock took over the leadership of Claiborne Farm upon the death of his father in 1972. Though only 23 at the time, he organized the syndicate that acquired Triple Crown winner Secretariat, who stood his entire stud career at Claiborne.