In another thread, I made the observation that even in a great horse’s best season, it was quite rare for the horse to go undefeated. So for those on the board who would find it interesting, here are the undefeated best seasons (3-year old seasons and up) of the horses in Blood-Horse magazine’s top 100 U.S. 20th century thoroughbreds, with a minimum of 5 races being required for listing.
These lists are interesting, in part because of the great horses whose best seasons qualified them to be listed, and in part because of the great horses who were not as successful in their best seasons, who did not qualify for listing. I hope some of you find this interesting.