Thousands of fans watch the 143rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., Saturday, May 6, 2017.

People are seen reflected in a puddle with one of the Twin Spires in between races at Churchill Downs in Louisville, Ky., Thursday, May 4, 2017. Churchill Downs is preparing for the 143rd running of the Kentucky Derby on Saturday.

Mike Smith aboard Abel Tasman reacts after winning the 143rd running of the Longines Kentucky Oaks at Churchill Downs, Friday, May 5, 2017.

David Hayes, of Indianapolis, wears a peacock feather bowtie while posing for a photograph on Kentucky Derby day at Churchill Downs in Louisville, Ky., Saturday, May 6, 2017.

Horses set off during the 143rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., Saturday, May 6, 2017.

Diana Sadler, of Dublin, Ohio, from left, Victor DiOrio, of Lexington, Ky., Dawn Cochran, of Dublin, Ohio, and Paul Cochran, also of Dublin, Ohio, root for Bird Song during the 14th running of the Alysheba on Oaks Day at Churchill Downs, Friday, May 5, 2017.

John R. Velazquez aboard Always Dreaming reacts after winning the 143rd running of the Kentucky Derby at Churchill Downs in Louisville, Ky., Saturday, May 6, 2017.

Winner of Kentucky Derby 143 Always Dreaming greets Jackie Avellino, of Long Island, N.Y., daughter of co-owner Anthony Bonomo, in his stall the morning after Kentucky Derby 143 at Churchill Downs in Louisville, Ky., Sunday, May 7, 2017.

Abel Tasman (13) with Mike Smith up wins the 143rd running of the Longines Kentucky Oaks at Churchill Downs, Friday, May 5, 2017.

Participants line up for the Longines Fashion Contest on Oaks Day at Churchill Downs, Friday, May 5, 2017.

Participants line up for the Longines Fashion Contest on Oaks Day at Churchill Downs, Friday, May 5, 2017.Participants line up for the Longines Fashion Contest on Oaks Day at Churchill Downs, Friday, May 5, 2017.

Becky Sights, of Henderson, Ky., waits under the grandstand on Oaks Day at Churchill Downs, Friday, May 5, 2017.