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Place your bets: Kentucky Derby horses get ready to race at Churchill Downs

Charlie Riedel / AP

Hot walker Cesar Zarco helps give Kentucky Derby entrant Union Rags a bath at Churchill Downs on May 2, in Louisville, Ky.

Charlie Riedel / AP

Kentucky Derby entrant Daddy Nose Best grazes after a morning workout at Churchill Downs Wednesday, May 2, in Louisville, Ky.

Morry Gash / AP

Exercise rider Zeke Castro takes Kentucky Derby entrant Went the Day Well for a workout at Churchill Downs on May 1.

John Sommers Ii / Reuters

Horses and exercise riders walk to the track during early morning workouts as preparations are in full swing for the 138th running of the Kentucky Derby at Churchill Downs in Louisville, Kentucky, on May 1.

 For the latest updates on the upcoming race on May 6 click here for coverage on NBC Sports.