seattleslew Horse of the Year, 1977 Mariners' lot? SWELL ESTATE!: 1977 Triple Crown winner of 1977 Swale's sire 1977 Triple Crown winner *Triple Crown winner who himself sired a Kentucky Derby winner Track star of 1977 [1977] Winner before Affirmed Bet by scads of people in Washington: 1977 Triple Crown winner: 1977