Shackleford (Forestry--Oatsee, by Unbridled), the 2011 GI Preakness S. winner, has been sold to continue his stud career in Korea, officials at Darby Dan Farm confirmed Thursday afternoon. Bred and raced by Mike Lauffer and Bill Cubbedge and trained by Dale Romans, the blaze-faced chestnut defied big odds to finish second in the GI Florida Derby and set the majority of the pace in the GI Kentucky Derby before settling for a close fourth-place effort. He defeated Derby winner Animal Kingdom (Leroidesanimaux {Brz}) two weeks later and would go on...