Leo Bar

 
hree Bars, the most influential Thoroughbred in American Quarter Horse history, was foaled April 8, 1940 near Lexington. Despite severe circulatory problems in a hind leg, Three Bars won races as a three-, four-, and five-year-old. As a six-year-old in 1946, he set a :57 3/5 track record over five furlongs at the Phoenix Fairgrounds in Arizona.