Surely there's not much that hasn't been said about the inimitable Gun Runner. A top 3-year-old--Grade I winner who placed in the Kentucky Derby, Travers, and Breeders' Cup Dirt Mile--he was nearly perfect at four. After a runner-up finish behind Arrogate halfway across the world in the Dubai World Cup, he never lost again, reeling off a string of Grade I scores which included the Breeders' Cup Classic. He hasn't broken stride at stud either, currently and remarkably ranked second on the U.S. general sires list with only his third...