Stem cell injection revives career of Breeders’ Cup Sprint contender Greg’s Gold

The day after winning a big stakes race in 2005, Greg’s Gold turned up in his barn with a bowed tendon — the kind of injury that depresses owners and puts expensive thoroughbreds out to pasture forever. Not this time. Using stem cells harvested from his own fat to repair his right front tendon, Greg’s Gold returned to racing at the highest level.