 He then sustained an injury (lameness due to a keratoma in his hoof) and was retired to stud in America.Throughout his stud career, El Gran Senor had low fertility and typically sired no more than 40 foals in any year - these days, most top sires and champions sire between 60 and 180 foals in a year.Over the course of his career, he fathered fewer than 400 foals.