Jockey Victor Espinoza Injured At Del Mar Racetrack After Horse Collapses, Dies

California Chrome jockey Victor Espinoza smiles as the horse crosses the finish line with a victory in the Pacific Classic at Del Mar Thoroughbred Club on Saturday, Aug. 20, 2016, in Del Mar, Calif. (AP/CBS)

DEL MAR, Calif.  (CBS) – A horse died during training at the Del Mar racetrack on Sunday (July 22), injuring jockey Victor Espinoza.

Kona Gold Stakes winner Bobby Abu Dhabi went into cardiac arrest on the track, owner Brian Trump tweeted around 10 a.m.

Espinoza, who won the 2015 Triple Crown on American Pharaoh, sustained fractured vertebrae and injuries to his neck and left arm, according to Jeff Furmanski, a spokesman for the Del Mar Thoroughbred Club.

The Hall of Fame jockey was being treated at Scripps Memorial Hospital La Jolla, where he will remain overnight, Furmanski said.

Trump, the owner, tweeted: “While we are deeply saddened and heartbroken by this loss our thoughts are currently with HOF jockey @VictorEspinoza.

“Please keep him in your prayers.”