04/01/2005 12:00AM

Someone's win streak must end


SAN MATEO, Calif. - Sunday's Bay Meadows feature offers two noteworthy examples of horses who seem to have found the secret to winning.

Ghost Actor has won four straight and five of six, losing only in a photo finish since his maiden victory.

El Prado's Boy has won three in a row, starting with his maiden victory on Dec. 19.

Ghost Actor and El Prado's Boy meet in a $50,000 optional claimer at one mile Sunday.

The field is filled with solid runners, including Final Finale, whose lone defeat in his past five starts came in a comeback attempt following a two-month layoff, and Derby Rider, who won a sprint prep after a three-month break.

This is the toughest field Ghost Actor or El Prado's Boy has ever faced. It includes Palmeiro, a graded stakes winner over the track; Zorro Rojo, a Grade 1 winner in his native Peru; and Mambo Train, winner of the Turf Paradise Derby last year.

The race seems wide open, but the versatile El Prado's Boy may rate a slight edge, thanks to his early speed.

A $62,000 purchase as a 2-year-old, he showed little in his debut. Entered in a $16,000 maiden claimer in his next start, El Prado's Boy was claimed by trainer Steve Miyadi.

After losing a photo in a $32,000 claimer on the turf, he beat straight maidens on grass. He then won a starter allowance on the turf from off the pace and followed up with a wire-to-wire allowance victory on the main track.

As good as El Prado's Boy looks, he'll have his hands full with Ghost Actor, who has steadily moved up the ladder since winning a bottom-level $8,000 maiden claimer. In his last start, returning from a two-month freshener, Ghost Actor overcame trouble to defeat Easy Million and Shadow Raider, two of his rivals Sunday.

The 4-year-old Mambo Train, who returned from a nine-month layoff on March 13 by finishing far back on the turf at Santa Anita, ran in seven graded stakes as a 2- and 3-year-old. Before his comeback, Mambo Train finished first in every start that wasn't against graded stakes competition, although he was disqualified once.