From a statistical viewpoint, the late Sadler’s Wells was the greatest sire in English and Irish Thoroughbred history. Not only did he lead the combined English/Irish sire list for a record 13 consecutive seasons and a record 14 times overall (beating records set by Highflyer two centuries earlier), but he sired 329 stakes winners, a record for a horse who served only in the Northern Hemisphere. Both of those records might well be in jeopardy in less than a decade’s time, however. And in the spirit of the hit television series “Game of Thrones,” the horse who may dethrone Sadler’s Wells is his own son Galileo.