How are jockeys engaged for the race?
Most jockeys will have an agent. It is the agent’s task to book the jockey’s mounts and deal with potential double-calls etc. Trainers do prefer to keep loyal to a few jockeys, some trainers simply try to book the best jockey available for a particular race. Thus there is a relationship (although sometimes tenuous) between the trainer and the jockeys that the trainer might engage for his / her horses. Sometimes the owner also has a particular preference, and they are able to influence the trainer. You may notice that a horse is often ridden by the same jockey for consecutive races.
