A major question, but the common used answer is that he sired 36 offspring.
It’s estimated that he sired between 36 and 40 foals, though his true total can never be known because many early records were lost or destroyed, with some estimates putting his real total closer to 100 . He had a very successful racing career, winning 18 of 21 races in two years at ages 2 and 3, with 12 stakes victories from 13 races as a 4-year-old. One such win was the Kentucky Derby by 2 lengths . Secretariat is still the third Triple Crown winner in history together with American Pharoah and Justify .