Keeping Score: The Derby Essentials Kentucky Derby entrant Essential Quality works out at Churchill Downs Thursday, April 29, 2021, in Louisville, Ky. The 147th running of the Kentucky Derby is scheduled for Saturday, May 1. (AP Photo/Charlie Riedel) Charlie Riedel A horse works out at Churchill Downs Friday, April 30, 2021, in Louisville, Ky. The 147th running of the Kentucky Derby is scheduled for Saturday, May 1. (AP Photo/Charlie Riedel) Charlie Riedel Published: 4/30/2021 6:30:46 PM Good morning! Each year about 20,000 thoroughbred foals are registered by owners who dream that three years hence their horse will be the chosen one to win the Kentucky Derby. The dream resumes today with the 147th Run for the Roses.