Kentucky Derby

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California Chrome, winner of the 140th Kentucky Derby, walks the shed row with assistant trainer Alan Sherman at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Trainer Art Sherman, center, speaks to the media about Kentucky Derby 140 winner California Chrome, outside Barn 20 at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Kentucky Derby winning trainer Art Sherman talks about California Chrome's victory at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Kentucky Derby winner California Chrome looks out of his stall at Churchill Downs in Louisville, Ky., Sunday, May 4, 2014. (AP Photo/Garry Jones)

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Victor Espinoza and trainer Art Sherman celebrate after Espinoza rode California Chrome to a victory in the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/Garry Jones)

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Assistant trainer Alan Sherman, left, celebrates with Victor Espinoza after Espinoza rode California Chrome to victory in the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/David Goldman)

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National Edition News cover for May 4, 2014 - Kentucky Derby: California Chrome runs away with first leg of Triple Crown: Victor Espinoza rides California Chrome to a victory during the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/David J. Phillip)

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Horses round the first turn during the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/Matt Slocum)

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California Chrome owners Steven Coburn, right, and Perry Martin hold the trophy after Victor Espinoza rode California Chrome to victory in the 140th running of the Kentucky Derby horse race at Churchill Downs Saturday, May 3, 2014, in Louisville, Ky. (AP Photo/David Goldman)