Damian Dovarganes / Associated Press
Autumn of the Horse Arms Runner overshadowed Sunday's San Simeon Stakes at Santa Anita Park in Arcadia, California, when he became the 23rd horse to die on the park then December 26th.
John Cherwa by The Los Angeles Times reported the news and noted that the Arms Runner fell under the degrees 3 race and was then euthanized after damaging his right front leg. La Sardane stumbled upon the Arms Runner but could rise.
Dr. Rick Arthur from the California Horse Racing Board confirmed death.
Jockey Martin Pedroza was aboard the Arms Runner and avoided serious injuries, as did Ruben Fuentes aboard La Sardane.
According to Cherwa, 10 of the death occurred on the track During training on the dirt surface, seven occurred when racing on the dirt and now sex has occurred during turf race.
Fox 5 San Diego noted Santa Anita opened Friday after nearly a month for officials to implement new rules and inspect the track.
California Horse Racing Board restricted anti-inflammatory drugs on horses and reduced the use of Lasix (which prevents horses from bleeding) by 50 percent. In addition, Santa Anita officials have conducted a number of actions, including veterinary records transparency, additional non-competition checks, and the need for trainers to seek permission to work a horse 48 hours in advance.
Arms Runner won his last race at Santa Anita Park in January.