Breeder/Owner: Federico Tesio 14-14-0-0, $86,328. Nearco (1935-1957) was an Italian bred Thoroughbred racehorse described by Thoroughbred Heritage as: One of the greatest racehorses of the Twentieth Century; and: One of the most important sires of the century. He was not only unbeaten, winning 14 races at distances from 5 furlongs to 1¼ miles, but also the patriarch of the most dominant sire line in Thoroughbred history.