Birdstone (Grindstone--Dear Birdie, by Storm Bird), who sired the winners of two-thirds of the 2009 Triple Crown with runners from his first crop to race, has been retired from stud duties at Gainesway. He will live out his days at Old Friends Retirement Center in Georgetown, KY. Bred by the late Marylou Whitney and trained by Nick Zito, the year-older half-brother to GI Kentucky Oaks winner Bird Town (Cape Town) won two of his three starts as a juvenile, including a 2 1/2-length success in the GI Champagne S. Eighth...