LOS ANGELES -- It's not often that a major league player changes his approach in a drastic way. It's less often that a major league player changes his approach while he's still enjoying success doing it the old way.The Los Angeles Dodgers seem to learn something new about Yasiel Puig every day.The Mike Trout comparisons are becoming more and more apt, because Puig is showing signs of becoming the kind of pure hitter -- selective, patient and lethal within the strike zone -- who is capable of contending for the MVP trophy season after season.