Leading sire and grade I winner Storm Cat was euthanized April 24 at Overbrook Farm in Lexington, Ky., due to complications from infirmities of old age. He was 30.

A son of Storm Bird out of the stakes-winning mare Terlingua, Storm Cat was bred and raced by William T. Young. During his racing career, he captured the Young America Stakes and finished second in the 1985 Breeders’ Cup Juvenile on the way to $570,610 in career earnings.

Storm Cat retired from racing in 1987 to stand at Overbrook Farm. After breeding his first book of mares in 1988 at a fee of $30,000, he spent 20 years at stud during a career that saw his fee rise to as high as $500,000.

According to Overbrook, Storm Cat sired earners of over $127 million, eight champions, and 108 graded stakes winners including winners of the Preakness Stakes, Belmont Stakes, Kentucky Oaks, and five Breeders’ Cup races. He ranked second on the all-time Breeders’ Cup sire list and was the sire of numerous European group I winners. He topped the general sire list twice, the juvenile sire list a record seven times, and was leading broodmare sire in 2012