Aidan O'Brien has submitted the names of 21 horses for the Triple Crown this year, the Irish News reports. Among the 3-year-olds under consideration are group I winner, Minardi, leading Two Thousand Guineas hopeful Hemingway, and Epsom Derby hopeful Galileo.

O'Brien hasn't had a horse compete yet in the U.S. Triple Crown events, though he is the trainer of Giant's Causeway, who just missed winning the Breeders' Cup Classic at Churchill Downs last November.

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