Nadal, one of the favorites for the Kentucky Derby, was retired following a workout at Santa Anita on Thursday after suffering a fracture to his left front leg.

The undefeated colt already had earned 150 qualifying points and was ranked No. 1 in the National Thoroughbred Racing Assn. poll of 3-year-olds. The news of the injury was first reported by the BloodHorse after confirmation from co-owner George Bolton.

Nadal was coming off a win in the split division of the Arkansas Derby, his fourth straight win. Nadal underwent surgery at Santa Anita with two screws inserted to repair a lateral condylar fracture. He had completed a half-mile workout. As a Grade 1 stakes winner, he now will be sent to the breeding shed.

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