The defection of Stay Thirsty on Wednesday from the Breeders’ Cup Classic, and the confirmation that Wise Dan will not even be pre-entered in the race, means that the number of horses expected to be pre-entered in the Classic on Monday should not exceed the maximum of 14. And there is a chance that fewer still could run in the race on Nov. 3 at Santa Anita, since, at the least, Dullahan and Nonios will be pre-entered in two races and could opt out.