Park Record Media Center

Rain runs down a pane of glass as a woman aboard a pony waits to guide a horse off the track during a workout session at Pimlico Race Course in Baltimore, Friday, May 16, 2014. The Preakness Stakes horse race is scheduled to take place on Saturday, May 17. (AP Photo/Patrick Semansky) ( APTOPIX Preakness Horse Racing )

As rain falls, exercise rider Willie Delgado takes Kentucky Derby winner California Chrome over the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 16, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 491254339 )

Preakness Stakes favorite California Chrome heads back to the barn after a morning workout in the rain under exercise rider Willie Delgado at Pimlico Race Course, Friday, May 16, 2014, in Baltimore. The 139th Preakness horse race takes place Saturday. (AP Photo/Garry Jones) ( Preakness Horse Racing )

Kentucky Derby winner California Chrome is bathed in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795329 )

Kid Cruz works the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795327 )

Exercise rider Willie Delgado takes Kentucky Derby winner California Chrome over the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490796997 )

A horse stands in a stall two days prior to the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795321 )

A passerby walks past betting windows two days prior to the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795309 )

Kentucky Derby winner California Chrome waits to be bathed after a workout at Pimlico Race Course in Baltimore, Wednesday, May 14, 2014. The Preakness Stakes horse race is scheduled to take place May 17. (AP Photo) ( Preakness Horse Racing )

Horses run on the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795323 )

A detail view of a horse two days prior to the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795315 )

Exercise rider Willie Delgado takes Kentucky Derby winner California Chrome over the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490763341 )

Kentucky Derby winner California Chrome is bathed in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795333 )

Exercise rider Willie Delgado, center, leads Kentucky Derby winner California Chrome to his stable as trainer Art Sherman, right, watches after a workout at Pimlico Race Course in Baltimore, Thursday, May 15, 2014. The Preakness Stakes horse race is scheduled to take place May 17. (AP Photo/Patrick Semansky) ( Preakness Horse Racing )

Bayern walks to the track in preparation for the 139th Preakness Stakes at Pimlico Race Course on May 15, 2014 in Baltimore, Maryland. (Photo by Patrick Smith/Getty Images) ( 490795331 )