No one knows whom the White Sox will take with the first pick in the MLB Draft on Saturday. And according to Sox director of amateur scouting Mike Shirley, that includes the Sox. “I don’t know who it is yet,” Shirley said Wednesday. “That’s the best part. And I feel like we’re going to keep working up to the moment to figure that out.” We do know this: Shirley said the Sox have narrowed their choices to shortstops Roch Cholowsky and Grady Emerson and catcher Vahn Lackey, though it’s widely belie