Santa Anita had its second horse death in four days when a gelding pulled up during a race Sunday and was euthanized a day later.
Twenty-five horses have now died in racing or training at the Southern California track since Dec. 26.
The Los Angeles Times reported that Spectacular Music was running in a six-furlong maiden claiming race when the jockey pulled the horse up on the backstretch shortly after leaving the gate.
The horse was taken off the course with a pelvis injury and the decision to euthanize him was made Monday morning.
On Friday, a 3-year-old horse broke down with a shoulder injury while galloping and was euthanized at the track.
Santa Anita Park suspended all racing and training back in March to address the issue.
But three horses have still died since the racing track was re-opened.
So far, no necropsy results have been released on any of those 25-horses.
Santa Anita is scheduled to host the Breeders' Cup Nov. 1-2. It's considered the biggest two-day event in U.S. horse racing.
(The Associated Press contributed to this report.)
