Jess Jackson, majority owner of Curlin, opted to send out the 2007 Breeders' Cup Classic champion for another campaign in 2008 instead of stud duties

ARCADIA, CA - OCTOBER 25: Jockey Robby Albarado atop Curlin competes in the Breeders' Cup Classic during the Breeders' Cup World Championships at Santa Anita Park October 25, 2008 in Arcadia...

...OCTOBER 25: Jockey Lanfranco Dettori celebrates with flower petals atop Raven's Pass after winning the Breeders' Cup Classic during the Breeders' Cup World Championships at Santa Anita Park October 25, 2008 in Arcadia...

Raven's Pass upset Curlin in the Breeders' Cup Classic at Santa Anita

Workers prepare Santa Anita in Arcadia, Calif., Tuesday, Oct. 21, 2008, for this weekend's Breeders' Cup horse races. Curlin was made the early 7-5 favorite Tuesday in a field of 12...

Trainer Rick Dutrow, Jr. will start defending champ Kip Deville in Saturday's Breeders' Cup Mile

Curlin is seen in the paddock during "schooling" for the upcoming Breeders' Cup horse races at Santa Anita Park in Arcadia, Calif., Thursday, Oct. 23, 2008. (AP Photo/Reed...

Jockey Mike Smith has the mount on favored Zenyatta in the Breeders' Cup Ladies' Classic

Curlin finished fourth in Saturday's Breeders' Cup Classic

Oak Tree at Santa Anita will host the 25th running of the Breeders' Cup

Wild Again won the first Breeders' Cup Classic 24 years ago

The 1984 Breeders' Cup Distaff (now called the Ladies' Classic) was the 17th career win in 21 starts for Princess...

2007 Breeders' Cup Mile winner Kip Deville finished fifth

Presious Passion is in for the Emirates Airline Breeders' Cup Turf

Big Brown will likely aim for the Travers and Breeders' Cup after June 7