Jockey Norberto Arroyo is off his only mount on Thursday - Onzaway (3) - in the third race after failing to show in the jockey's room at the appointed time, an hour before post time, according to track stewards.

Arroyo has been replaced by Martin Pedroza. Arroyo was not reachable by phone Thursday afternoon.

Arroyo has had a tough Del Mar. He does not have an agent and is no longer riding for trainer Peter Miller, with whom he had a successful relationship in the first six months of the year, winning more than 40 races. Miller said at the start of the meeting that he would no longer use Arroyo on his horses.