Apprentice Keelan Baker was taken to hospital for further examination following a fall at Wolverhampton on Tuesday evening.
Baker was unseated from the Bernard Llewellyn-trained Let Me In in the Betway Live Casino Handicap, which was the second race on the card.
He was treated on the track before being taken to hospital.
Clerk of the course Fergus Cameron said: "Keelan sustained possible leg and pelvic injuries and was taken to New Cross Hospital for further examination. He was conscious throughout."
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