Correction Appended: May 6, 2013 and May 30, 2013
In the center Island of a sleepy cul-de-sac in my suburban Kansas City, Mo., neighborhood, a pair of huge stone markers stand in memory of two horses buried beneath the stones. lawrin, one stone announces solemnly. A darkly handsome Thoroughbred with matching white socks on his forelegs, Lawrin charged from the pack at Churchill Downs to win the 1938 Kentucky Derby by a length with a 22-year-old Eddie Arcaro on his back. Though Arcaro went on to become an international celebrity, the only jockey to win two Triple Crowns, he would...