Kentucky Derby

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

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Exercise rider Bryan Beccia takes Kentucky Derby entrant Ride On Curlin for a morning workout during a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Morry Gash)

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Exercise rider Jelani Grant takes Kentucky Derby entrant Candy Boy 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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Dan Queenan holds Kentucky Derby entrant Commanding Curve after a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/David Goldman)

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Exercise rider Isabelle Bourez takes Kentucky Derby entrant Intense Holiday 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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Kentucky Derby entrant Tapiture gets a bath after a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Exercise rider Ovel Merida takes Kentucky Derby entrant Vinceremos for a morning workout during a morning workout at Churchill Downs Friday, May 2, 2014, in Louisville, Ky. (AP Photo/Morry Gash)