Let me say first that I know nothing about this incident.
However, I once had Alex Solis tell the Track Vet the same thing about a horse he was riding for me and got us scratched at the post.
The fact is there was nothing wrong with the horse, but he had the favorite in the next race, a half million dollar purse...and wanted to rest.
My horse was entered a few days later and won...and went on to win again and again.
All together, a jockey may have his own agenda...guess who never got a call for any more of my horses, either?