NEW YORK — The co-owner of Preakness winner Rachel Alexandra says the star filly will not run in the Breeders' Cup later this year.

Jess Jackson said Wednesday that he isn't willing to run the 3-year-old filly on the synthetic surface at Santa Anita in November after a fourth-place finish by his two-time Horse of the Year Curlin in last year's Breeders' Cup Classic, also at Santa Anita.

Rachel Alexandra returns to the track for the first time since her Preakness win, when she runs in Saturday's Mother Goose at Belmont Park.

Jackson is uncertain what the rest of the year holds for his filly, but he did not rule out races against the boys.

He mentioned the Delaware Handicap, the Haskell Invitational and the Travers as possibilities.