Louisville

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California Chrome arrives at Churchill Downs for the Kentucky Derby in Louisville, Ky., Monday, April 28, 2014. California Chrome has won his last four races by a combined 24 ¼ lengths. (AP Photo/Garry Jones)

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California Chrome is seen from a horse van after arriving at Churchill Downs for the Kentucky Derby in Louisville, Ky., Monday, April 28, 2014. California Chrome has won his last four races by a combined 24 ¼ lengths. (AP Photo/Garry Jones)

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California Chrome walks into Barn 20 at Churchill Downs for the Kentucky Derby in Louisville, Ky., Monday, April 28, 2014. California Chrome has won his last four races by a combined 24 ¼ lengths. (AP Photo/Garry Jones)