How Secretariat is incredibly related to 19 of 20 horses in the Kentucky Derby field

How Secretariat is incredibly related to 19 of 20 horses in the Kentucky Derby field originally appeared on The Sporting News. Add The Sporting News as a Preferred Source by clicking here.

In 1973, Secretariat won the Triple Crown, breaking the record time in each of the three races.

As those genes were passed on, so too were the horses' winning ways. Last year, every last Kentucky Derby horse was a descendant of Secretariat, per the Louisville Courier Journal.

Secretariat is believed to have sired 663 foals registered foals in his lifetime, making his bloodline vast decades later. This year's field is no different.

Here is a list of which horses are related to the 1973 legend.

MORE: Complete list of all-time Kentucky Derby champions, Triple Crown horses

Which Kentucky Derby horses are related to Secretariat?

Of the 20 horses this year, 19 are related to Secretariat, according to Secretariat.com.

One horse year is equivalent to roughly 3 human years, meaning that, since Secretariat's victory, about six generations of his offspring have entered the world.