Exercise rider Rosie Napravnik rides Kentucky Derby entrant Mylute for a workout at Churchill Downs, Friday, May 3, 2013, in Louisville, Ky. The 139th running of the Kentucky Derby occurs Saturday. ... more 
Exercise rider Rosie Napravnik rides Kentucky Derby entrant Mylute for a workout at Churchill Downs, Friday, May 3, 2013, in Louisville, Ky. The 139th running of the Kentucky Derby occurs Saturday. (AP Photo/Morry Gash) less 
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Associated Press | Photo By Morry Gash
Fri, May 3, 2013 6:19 PM EDT