ARCHARCHARCH, with exercise rider Jon Court.
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SANTIVA, with exercise rider Brendan Walsh.
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BRILLIANT SPEED, with exercise rider Dan Blacker.
Charlie Riedel / AP
A horses does its morning workouts under the lights at Churchill Downs on Thursday.
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Steam rises off a horse as it gets a bath after a morning workout at Churchill Downs.
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MUCHO MACHO MAN, with exercise rider Mike Heera.
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DIALED IN, with exercise rider Carlos Correa.
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PANTS ON FIRE, with exercise rider Juan Pizzarro.
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Horses make their way to the track for Thursday morning workouts at Churchill Downs.
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Exercise rider Carlos Rosas takes Kentucky Derby entrant Nehro for a workout at Churchill Downs.
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MIDNIGHT INTERLUDE, with exercise rider Dana Barnes.
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TWINSPIRED, with exercise rider Derrick Smith.
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DERBY KITTEN, with exercise rider Rachel Muzikar.
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UNCLE MO, with exercise rider Hector Ramos.
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NEHRO, with exercise rider Carlos Rosas.
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ANIMAL KINGDOM, with exercise rider James Slater.
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Horses make their way to the track just as the sun rises Thursday for a workout under the lights at Churchill Downs.
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STAY THIRSTY, right, and Uncle Mo, with trainers and exercise riders.
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DECISIVE MOMENT, with exercise rider Juan Arias.
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TWICE THE APPEAL, with exercise rider Nate Quinonez.
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WATCH ME GO, center, with exercise rider Louie Feliciano.
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SOLDAT, with exercise rider Danny Wright.
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SHACKLEFORD, with exercise rider Faustino Ramos.
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COMMA TO THE TOP, right, with exercise rider Patrick Valenzuela.
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