Jockey Antonio Pena was listed in stable condition following a spill in Tuesday's fifth race at Philadelphia Park.
Attending physician Dr. Brian Rizen reported that the jockey was "semi-comatose" when he began his initial evaluation and that during the trip to the hospital, "mouth-to-mouth was needed to restore his vital signs. His blood pressure and vital signs had all stabilized by the time we reached the hospital," said Rizen.