Louisville

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Exercise rider Benito Alvarado on Kentucky Derby hopeful Uncle Sigh and Exercise rider Emerson Chavez on Kentucky Derby hopeful Commanding Curve go for a morning workout at Churchill Downs Wednesday, April 30, 2014, in Louisville, Ky. (AP Photo/Morry Gash)

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Trainer Dallas Stewart smiles after his colt, Commanding Curve, drew post position No. 17 for the Kentucky Derby horse race in the blind draw at Churchill Downs in Louisville, Ky., Wednesday, April 30, 2014. (AP Photo/Garry Jones)

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Jockey Corey Nakatani shows his daughter Lilha Kentucky Derby hopeful Dance With Fate after a morning workout at Churchill Downs Wednesday, April 30, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Kentucky Derby hopeful Dance With Fate eats after a morning workout at Churchill Downs Wednesday, April 30, 2014, in Louisville, Ky. (AP Photo/Charlie Riedel)

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Exercise rider Issac Muniz takes Kentucky Derby hopeful Dance With Fate for a morning workout at Churchill Downs Wednesday, April 30, 2014, in Louisville, Ky. (AP Photo/Garry Jones)