Timmy Murphy sustained a suspected shoulder injury following a fall in the Clovelly Lifeboat Juvenile Novices' Hurdle at Newton Abbot.
The jump jockey was unseated from the David Elsworth-trained Highland River at the first flight. He was treated on the ground before being taken to Torbay General Hospital for X-rays.
The race was won by the 4-7 favourite Fongoli, who made all the running under Tony McCoy.