"Despite top training and a patient campaign, Rachel Alexandra did not return to her 2009 form," Jackson said in a statement. "I believe it's time to retire our champion and reward her with a less stressful life."
After winning the Kentucky Oaks by 20 lengths the day before the 2009 Kentucky Derby, Rachel Alexandra stumbled at the start of the Preakness but was good enough to beat Mine That Bird, the Derby winner, to the wire. It was the first Preakness victory by a filly since 1924.
•Real Quiet, the 1998 Kentucky Derby and Preakness winner who came within a nose of winning the Triple Crown, died Monday from injuries suffered in a fall in his paddock in Harrisburg, Pa. Trained by Bob Baffert, Real Quiet beat Victory Gallop by half a length in the Kentucky Derby and by 21/4 lengths in the Preakness before losing by a nose in the Belmont.