Jockey Umberto Rispoli was back home and reportedly suffered no serious injuries in a spill during the first race at Del Mar Thursday afternoon. Rispoli was riding Single Track Mind in heavy traffic when he was bumped by a rival and was unseated, then was kicked by a trailing horse. Another horse was able to take evasive action as Rispoli rolled under the rail near the eighth pole. He was removed by stretcher by paramedics and carried to a waiting ambulance and was later released from the hospital. "I'm doing...