May 15 (UPI) -- Rio Moon became the eighth horse to die at Churchill Downs in less than three weeks after the 3-year-old colt sustained a broken leg and was euthanized, Equibase race records show.
The race notes said that the horse sustained a "catastrophic injury" to his left foreleg after the wire of the sixth race and was euthanized Sunday at the Louisville, Ky., track.
Churchill Downs did not immediately respond when asked for a comment about the colt's death.
Rio Moon, ridden by Martin Garcia and trained by Dale Romans, made six career starts and earned $11,621.
Kentucky Derby winner Mage eyes Preakness; probe into horse deaths continues
