2010 Kentucky Derby
An exercise rider works his horse around the track at Churchill Downs Tuesday, April 27, 2010, in Louisville, Ky.
2009 Kentucky Derby
Credit: AP Photo/Ed Reinke
An exercise rider works his horse around the track at Churchill Downs Tuesday, April 27, 2010, in Louisville, Ky.
2009 Kentucky Derby
Credit: AP Photo/Ed Reinke