John Velasquez replaced Robbie Alvarado on the Derby winning mount, because Robbie had been kicked in the face by a horse and the owner felt he wanted a jockey that was 100% on his horse.

Shit happens in racing like this all the time.

If the kid committed suicide for the reason he lost the mount... well, he wouldn't have gotten very far in the industry.

He came from a family of jockeys. I do not believe he killed himself over a lost mount. No how, no way...