cause to sit or seat or be in a settled position or place; "set down your bags here"
a suspension. Also, put to a drive, or asked to run by the jockey.
1. To ask a horse for speed; 2. To suspend a jockey, trainer, etc., from racing for a specific period of time.
A jockey who has been suspended has been "set down."
Jockey suspended from racing for a specific length of time.