Alydar was a famous American Thoroughbred racehorse born in 1975. He is best known for his rivalry with Affirmed, another legendary racehorse, during the Triple Crown races in 1978. Alydar finished second to Affirmed in all three races: the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes. Despite his close finishes, Alydar had a successful racing career, winning several prestigious races and earning over $900,000 in prize money. After retiring from racing, he became a notable sire, producing many successful offspring in the racing world. Alydar passed away in 1990 but remains a significant figure in horse racing history.