Part of the allure of the Breeders’ Cup World Championships every year is picking out a horse few others saw as a serious contender and watching him or her surprise everyone in the stretch. When you have 14 championship races that draw the best horses from around the world, the result is deep, talented field throughout the entire card, which happens to be a terrific recipe for longshot winners. That’s why on Breeders’ Cup weekend you can bet a horse at 12-1 or 15-1 or even 25-1 odds and still put your money on a graded stakes winner in good form.