Two-time leading North American Thoroughbred sire A.P. Indy has been pensioned at William S. Farish's Lane's End Farm near Versailles, Ky., after none of the mares bred to him this year have been pronounced in foal.

Farish said the 22-year-old son of Seattle Slew had been unable to impregnate any of the more than 25 mares bred to him during the 2011 breeding season. He said all syndicate members have been notified of the decision.

"We had some vets in last week trying to look for some magic answer, but he is 22 years old," Farish said April 8. "He's had a great run. He's obviously been a great stallion for us."

A.P. Indy is the second major Lane's End stallion to be pensioned recently, with the farm announcing last September that Kingmambo would no longer be servicing mares.

"Losing him and Kingmambo in such a short period of time is a tough blow, but both horses had been waning," Farish said. "They're tough to replace."

A.P. Indy was voted Horse of the Year and champion 3-year-old male in 1993 after winning the Belmont Stakes, Breeders' Cup Classic, and Santa Anita Derby.

As a stallion, he has sired more than 135 stakes winners, including champions popular Thoroughbred sire Mineshaft, 2006 Preakness Stakes winner Bernardini, and Rags to Riches, the filly who won the 2007 Belmont Stakes, among others.