Jerry and Ann Moss’ homebred Giacomo, upset winner of the Kentucky Derby (gr. I) will be sidelined for the remainder of the year with a bone chip in his left front ankle, suffered in the Belmont Stakes (gr. I). Trainer John Shirreffs said the prognosis is excellent, and he is optimistic the colt will return to the races as a 4-year-old.

On Thursday, Frank Stronach announced he had bought a majority interest in the breeding rights of Giacomo, and the son of Holy Bull will stand at his Adena Springs Kentucky farm near Midway.

“Dr. (Jeff) Blea said the ankle looks really good,” Shirreffs said. “You wouldn’t even know looking at him that anything was wrong. Normally, it takes three to four months after you take the chip out. Dr. (Rick) Arthur will perform the surgery here a t Hollywood Park anytime between next Monday and Wednesday, then depending on how it goes, he said he could stay here at the track and rehab.”

Following the Belmont, in which Giacomo finished seventh after taking the lead nearing the quarter pole, jockey Mike Smith said Giacomo was making loud noises, indicating he likely displaced his palate. Following the race, veterinarian James Hunt attempted to get him to displace, but was unable to