In this photo released by Benoit Phot, Zenyatta with jockey Mike Smith up, is led to the race track for the Grade I $250,000 Santa Margarita Invitational Stakes horse race Saturday, March 13, 2010 at Santa Anita Park, Arcadia ...

In this photo provided by Benoit Photo, Zenyatta schools at Santa Anita Park on Thursday, March 11, 2010, in Arcadia, Calif. Zenyatta arrived Thursday at Santa Anita Park for final preparations ahead of her return to racing in the Santa ...

Alphie's Bet with Alex Solis aboard heads for the winner's circle after winning the Sham Stakes $150,000 horse race for 3-year-olds at Santa Anita Park in Arcadia, Calif., Saturday, March 6, 2010. (AP Photo/Reed Saxon)

Trainer Bob Morey Jr., right, leads Bold Chieftain with jockey Russell Baze aboard to the winner's circle after their victory in the $500,000 Sunshine Millions Classic horse race at Santa Anita Park in Arcadia, Calif., Saturday, Jan. 30 ...