Multiple Group One winner Merchant Navy has been retired and will take up stud duties at Coolmore Australia in the spring.

The son of Fastnet Rock won the Gr. 1 Coolmore Stud Stakes last November when trained by Aaron Purcell. He joined the stable of champion trainer Aidan O’Brien earlier this year, winning the Gr. 2 Greenlands Stakes at the Curragh and the Gr. 1 Diamond Jubilee Stakes at Royal Ascot is his only two appearances.

“Merchant Navy proved himself a very special horse,” O’Brien told Racing Post. “For a three-year-old to come from Australia and win like he did at the Curragh and Royal Ascot while being weighted as an older horse was remarkable.

"He was actually 12 pounds wrong in the Diamond Jubilee. Only a horse with such natural speed and wonderful temperament like he has could do it.”

Merchant Navy finishes with a career record of 10 starts for seven wins, two placings and more than £950,000 (NZ$1.84 million) in prize-money.

“Merchant Navy’s amazing win at Royal Ascot means he retires to stud as one of the best sprinting colts of modern times,” said Coolmore Australia’s Tom Magnier.

“We are very excited about his stallion prospects, as he was such a brilliant three-year-old sprinter, just like his sire Fastnet Rock and grandsire Danehill.”