Racegoers watch as jockey Colm O'Donoghue rides Revolving through the paddock Saturday before the third race at the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

A spectator wears a fancy hat Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

A spectator wears a fancy hat Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky. The Run for the Roses draws them to Churchill Downs. But what racegoers wear is as much a spectacle in itself.

Associated Press

Corrine Gaxiola from New York reads a racing program Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Gino Desimone arrives in a horsehead mask Saturday for the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

A spectator wears a fancy hat Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

A spectator wears a fancy hat Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Tamara Sorrell from Austin, Texas, wears a fancy hat Saturday in the paddocks before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky. The Run for the Roses draws them to Churchill Downs. But what racegoers wear is as much a spectacle in itself.

Associated Press

Mary Bowe from Maples, Fla., holds a rose while sitting in the grandstand Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Stephanie Harris from Lexington, Ky., waits for the start of a race Saturday in the grandstand before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Amanda Lear from Ruby, S.C., watches horses in the paddock area Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Spectators chat in their grandstand seats Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Spectators sit in the grandstand Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Spectators study their race programs Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

A spectator walks through the paddock Saturday before the 138th Kentucky Derby at Churchill Downs in Louisville, Ky.

Associated Press

Spectators congregate in the infield Saturday at Churchill Downs before running of the 138th Kentucky Derby in Louisville, Ky.