Joseph O’Brien’s St Leger winner Galileo Chrome has been retired to stand as a National Hunt stallion at Starfield Stud.

The colt went through his three-year-old season unbeaten in four outings, progressing with each race.O’Brien said: “Australia was one of the best I rode and Galileo Chrome is easily one of the best I’ve trained.

“Unbeaten this year culminating in the St Leger, I think he could have been the leading middle-distance horse in Europe next year.However, fortunately for breeders, he retires to stud and offers an opportunity to use a top-class racehorse. He’s a beautiful looking individual with all the qualities I look for. I could not recommend him enough and look forward to training his offspring.”

A grandson of Galileo, Galileo Chrome won four of just five starts and was produced by the Dansili mare Curious Mind.