Jockey Laura Werner was being treated for a possible collarbone injury after being unseated from 4-5 favorite Dressed in Prada at the start of Sunday's third race.

Dressed in Prada stumbled leaving the gate and unseated Werner who fell heavily. An apprentice who claims seven pounds, Werner rose quickly, but immediately grabbed her shoulder.

Werner is likely to be taken to a local hospital for treatment.

A replacement rider has been named in the fourth race. Brayan Pena will ride Private Prospect (5) in a $12,500 claimer at 1 1-16 miles. The amended weight is 120 pounds since Pena is not an apprentice.