Black Onyx was scratched late Friday morning (May 3) from the May 4 Kentucky Derby Presented by Yum! Brands at Churchill Downs.

The decision to remove Sterling Racing’s entrant from the May 4 classic at 1 1/4 miles was due to a non-displaced chip in a left fetlock discovered after Black Onyx trained the morning of May 3, trainer Kelly Breen said.

"We noticed a little swelling in his ankle this morning," Breen said at a press conference at Churchill Downs. "It brought major concern right away. He did gallop this morning. He came back and on a scale of lameness on a one out of five, it was a one. It did warrant us to take an X ray where we found that he does have a chip in his left ankle."

The scratch came after the 9 o’clock scratch time