Brian Roberts led the majors in doubles last season with 56, but care to take a guess who was second? The title of the blog gives it away, but many people would go through many names and not even think of Billy Butler posting 51 two-baggers. In fact, those doubles put him in a select group. Consider the players who have hit 50 or more doubles at age 23 in the big leagues: Hank Greenberg, Enos Slaughter, Stan Musial, Alex Rodriguez, Albert Pujols, Grady Sizemore and Miguel Cabrera. Pretty good company.