People are always asking me who is the greatest horse I have ever seen. I tell them that in my opinion, Secretariat and Damascus had the most incredible 3-year-old campaigns, and Dr. Fager, in 1968, was the greatest horse who ever set foot on an American racetrack. But over the course of an entire career, at ages 2, 3, and 4, Spectacular Bid was the greatest horse I have ever seen....