Morry Gash/AP
Trainer Rudy Rodriguez rides Kentucky Derby hopeful Vyjack for a workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
David Goldman/AP
Horses go out for a morning workout at Churchill Downs Friday, May 3, 2013, in Louisville, Ky. Saturday will be the 139th running of the famous race.
Morry Gash/AP
Exercise rider Emerson Chavez waits to take Kentucky Derby hopeful Golden Soul for a workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
Charlie Riedel/AP
Kentucky Derby hopefuls Falling Sky, left to right, Charming Kitten and Black Onyx go for a morning workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
Morry Gash/AP
Jockey Rudy Quevedo rides Kentucky Derby entrant Oxbow for a workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
Charlie Riedel/AP
Karen Vanzant, from Brookfield, Colo., walks through the paddock with her fancy hat before the running of the 139th Kentucky Derby at Churchill Downs Friday, May 3, 2013, in Louisville, Ky.
David Goldman/AP
Exercise rider Patti Krotenko rides Kentucky Derby hopeful Charming Kitten for a workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
David Goldman/AP
A rider makes his way to the track for a morning workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
David Goldman/AP
A jockey looks over the track as the sun begins to rise during morning workouts at Churchill Downs, May 2, 2013, in Louisville, Ky.
David Goldman/AP
Exercise rider Patti Krotenko rides Kentucky Derby entrant Charming Kitten for a workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
Garry Jones/AP
People watch as horses take to the track for a morning workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
David Goldman/AP
Exercise rider Javier Harrera rides Kentucky Derby entrant Normandy Invasion for a workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
Charlie Riedel/AP
A horse waits to take his morning workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
David Goldman/AP
Ray Amato Sr. shoes a horse named Herro at Churchill Downs, May 1, 2013, in Louisville, Ky.
Charlie Riedel/AP
A horse breaks free during a morning workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
Morry Gash/AP
Exercise rider Emerson Chavez rides Kentucky Derby entrant Golden Soul for a workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
David Goldman/AP
A horse walks past the starting gate during a morning workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
Charlie Riedel/AP
Trainer Todd Pletcher watches horses during a morning workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
Garry Jones/AP
Exercise rider Jenn Patterson rides Kentucky Derby entrant Orb for a workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
J. David Ake/AP
A horse makes its way to the track for a morning workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
David Goldman/AP
Jockey Ramone Vazquez watches as Kentucky Derby horses enter the track at Churchill Downs, May 1, 2013, in Louisville, Ky.
David Goldman/AP
A rider gets ready for a morning workout at Churchill Downs, May 2, 2013, in Louisville, Ky.
Morry Gash/AP
Exercise rider Jonny Garcia gets ready to take Kentucky Derby entrant Goldencents for a workout at Churchill Downs, May 3, 2013, in Louisville, Ky.
Garry Jones/AP
Horses make their way around the track during the second race before the running of the 139th Kentucky Derby at Churchill Downs, May 3, 2013, in Louisville, Ky.
Charlie Riedel/AP
Offalia Mehia holds a horse while it is being bathed after a morning workout at Churchill Downs, May 1, 2013, in Louisville, Ky.
