BALTIMORE, MD--Immediately after the May 1 GI Kentucky Derby, it appeared that the GI Preakness S. two weeks hence would be a routine affair. Trainer Bob Baffert would be heading to Pimlico with a record seventh Derby victory under his belt and he would be in the enviable position of trying to collect his eighth win in the second jewel of the Triple Crown. And then the unthinkable happened. The Derby winner, Medina Spirit (Protonico), tested positive for Betamethasone, a substance banned on race day. That single event sparked a...