Creator, trained by Steve Asmussen, schools in the paddock in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Creator, trained by Steve Asmussen, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Destin, trained by Todd Pletcher, schools in the paddock in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Trainer Doug O'Neill (left) alongside his brother, Dennis O'Neill (right), watch Nyquist during his bath after morning exercise at Churchill Downs in Louisville, Kentucky.Assistant Trainer Julie Clark rubs Exaggerator, while he schools in the paddock in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Mohaymen, trained by Kiaran McLaughlin, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Assistant Trainer Neil McLaughlin holds on to Mohaymen, trained by Kiaran McLaughlin, before he galloped in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.My Man Sam, trained by Chad Brown, getting bathed after he galloped in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Undefeated Nyquist, trained by Doug O'Neill and owned by Paul Reddam is the 2016 Kentucky Derby favorite.Nyquist, with regular exercise rider Jonny Garcia up, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Nyquist, with regular exercise rider Jonny Garcia up, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Nyquist, with regular exercise rider Jonny Garcia up, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Undefeated Nyquist, trained by Doug O'Neill and owned by Paul Reddam is the 2016 Kentucky Derby favorite.Nyquist, with regular exercise rider Jonny Garcia up, returns from morning exercise in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Nyquist, with regular exercise rider Jonny Garcia up, before starting morning exercise in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Nyquist, with regular exercise rider Jonny Garcia up, before starting morning exercise in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Oscar Nominated, trained by Mike Maker, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Oscar Nominated, trained by Mike Maker, gallops in preparation for the Kentucky Derby at Churchill Downs in Louisville, Kentucky.Scenes and fashions from "Thurby" Day at Churchill Downs in Louisville, Kentucky.