There are valid reasons for the Dodgers to bat Yasiel Puig leadoff this season, but this logic from manager Don Mattingly is interesting: Mattingly still thinking of Puig as leadoff man, says Puig "hasn't proven himself to be a RBI guy yet."- Dylan Hernandez (@dylanohernandez) February 22, 2014 According to Ken Gurnick of MLB.com, Mattingly...