Stevens confirmed as Johannesburg jockey Three-times Kentucky Derby winning jockey Gary Stevens is to partner Johannesburg in Saturday`s 'Run For The Roses' and Jerry Bailey is to ride the other Aidan O`Brien-trained candidate Castle Gandolfo.The bookings were announced by Coolmore representative Demi O`Byrne at Churchill Downs today after the two colts had arrived safely at Keeneland racecourse last night.O`Byrne indicated that it was O`Brien who decided which of the two top Americans rode each horse.He said: 'We are very lucky to get Gary and Jerry but in the end it was Aidan`s call as to who rode what. The horses arrived at Blue Grass Airport last night and went directly into quarantine. How long they stay there depends on the result of blood tests.'It is understood that last year`s Breeders` Cup Juvenile winner Johannesburg and Castle Gandolfo will have their only work ahead of the Derby at Keeneland on Friday before travelling to Louisville early on Saturday.
