Three Santa Anita-based sophomores headed to the GI Kentucky Derby tuned up Saturday morning over their home track. Hot Rod Charlie (Oxbow), who will have his fair share of backers off his front-running victory in the GII Louisiana Derby, went three-quarters of a mile in :1.14.20 for two-time Derby-winning conditioner Doug O'Neill. Flavien Prat, who was tabbed earlier this week for the ride, was aboard. "He looked solid. So far, so good," said O'Neill. Rock Your World (Candy Ride {Arg}), who remained perfect in three starts with his front-running success...