Louisville

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Frank Compton watches as Kentucky Derby entrant Ride On Curlin eats after a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/David Goldman)

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Kentucky Derby entrant Uncle Sigh grazes after a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/David Goldman)

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Horses get bathes after morning workouts at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/David Goldman)

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Trainer Gary Contessa pets Kentucky Derby entrant Uncle Sigh as they school in the paddock at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Trainer Bob Baffert talks to Bode Miller during a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Kentucky Derby entrant Wicked Strong is walked after a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Charlie Riedel)

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Exercise rider Abel Flores takes Kentucky Derby entrant Tapiture for a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Exercise rider William Delgado takes Kentucky Derby entrant California Chrome for a morning workout during a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Charlie Riedel)

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Exercise rider William Delgado takes Kentucky Derby entrant California Chrome for a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Garry Jones)