10 Best Racehorses of all Time 

1. Affirmed

Before American Pharoah rose to the occasion in 2015, Affirmed had been the only racehorse to capture the Triple Crown in 37 years.

2. Winx

One of the best racehorses ever born in Australia is without a doubt Winx. The bay Thoroughbred mare triumphed in 37 of 42 attempts.

3. Kincsem

As a filly, she won races in Hungary, England, France, and Germany. Said to be a diva, the chestnut always traveled with a companion cat and only liked to eat at her home barn.

4. Seattle Slew

One of just two horses to have ever won the Triple Crown while having an unblemished career is Seattle Slew.

5. Black Caviar

Another one of the greatest racehorses to grace Australia is Black Caviar. During her racing career from 2009-2013, she won all 25 of her starts.

6. Dr. Fager

During his career, Dr. Fager set many track records including the new world record in the mile at 1:32​1⁄5. His major wins include the 1967 Arlington Classic, the 1967 Hawthorne Gold Cup and the 1968 United Nations Handicap.

7. Kelso

One of just two horses who have ever won the Triple Crown while having an unblemished career is Seattle Slew. The stunning dark bay colt achieved great success between 1976 and 1978, winning 14 of his 17 outings.

8. Citation

Citation, one of the best, was the first horse to ever earn more than $1 million. In his 45 races from 1947 to 1951, the handsome bay won 32 of them.

9. Secretariat

The Secretariat is frequently hailed as the greatest racehorse of all time, and those individuals are not mistaken. He won 16 of his 21 starts throughout his remarkable career, which lasted from 1972 to 1973.

10. Man o’ War

Man o' War is considered by many experts to be the greatest racehorse in history. During his career from 1919 to 1920, the fiery chestnut won 20 of his 21 starts, an incredibly amazing performance.