Multiple grade 1 winner Rock Hard Ten , who had been standing at Jeju Stud Farm in South Korea since 2013, died Nov. 12, according to Korea Racing Authority records.

The 20-year-old son of Kris S started racing at 3 and by his third third start was grade 1-placed in the 2004 Santa Anita Derby for trainer Jason Orman.

He was undefeated at 4 in three starts—the Strub Stakes (G2), Santa Anita Handicap (G1), and Goodwood Breeders’ Cup Handicap (G2). He retired with $1,870,380 in earnings.

Rock Hard Ten stood for nine seasons at Lane’s End. He sired 25 black-type stakes winners, including G1 winner Nereid.

Rock Hard Ten sired 330 winners and his progeny have amassed more than $27 million in earnings. He started out strong with Korean breeders, breeding 94 mares his first year at stud there.