[jjotto]

Seriously?

I think Secretariat’s Triple Crown races times are still standing records.

[jpsb]

Lets not forget Man of War, different era, but a great race horse

Wiki

"Man o' War was inducted into the National Museum of Racing and Hall of Fame in 1957. Soon after, the Man o' War Stakes was created in his honor. In the Blood-Horse magazine ranking of the top 100 U.S. Thoroughbred champions of the 20th Century, Man o' War was ranked No. 1. He was also ranked No. 1 by the Associated Press as the greatest horse of the 20th century in a separate poll. He was also ranked No. 1 greatest horse in racing history by Sports Illustrated(panel of 7) in 1992.