In a way, I’m sad to report this.

Filly Rachel Alexandra was 2009 Horse of the Year was retired this week.

Jess Jackson, co-owner of the 4-year-old filly, said it was time to “reward her with a less-stressful life.”

And I thank her for hours of enjoyment watching her race, and for the money I won betting on her to win.

Jackson said Rachel Alexandra would be bred to Curlin, North America’s Horse of the Year in 2007 and 2008, at Jackson’s Stonestreet Farm near Lexington, Ky.

Not too bad a pairing, eh?

“Imagine what possibilities those two super horses might produce,” said Jackson, who owns a majority stake in Curlin.

Rachel Alexandra won 2 of 5 starts this year, after going 8 for 8 last year.

During perhaps the greatest season of all time for a 3-year-old filly, Rachel Alexandra won the Grade I Kentucky Oaks by 20 ¼ lengths and defeated males in three Grade I races — the Preakness at Pimlico in Baltimore; the Haskell Invitational at Monmouth Park in Oceanport, N.J.; and the Woodward at Saratoga in Saratoga Springs, N.Y.

Rachel Alexandra was a fan favorite.

She had the most fluid and beautiful stride of any horse I have ever seen. said one observer, and I agree.

Such I beautiful horse. May she have a quiet, nice rest of her life.

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