Sponsored by: Simon Callaghan trains Chilean import Brooke for Don Alberto Stable Brooke, a Chilean-bred mare who was a monster in her native country, gong off as the odds-on favorite in six of her seven races while winning five, makes her United States debut in Monday's Martin Luther King Jr. holiday feature, the Grade 3 Megahertz Stakes at Santa Anita in Arcadia, Calif. “She's been training very forwardly,” said Simon Callaghan, who conditions the 5-year-old chestnut for the Don Alberto Stable. “I've had her for three or four months. The owners thought she would like the firm turf in California, which is why they sent her here.