code: def read_xml(cls, url, markup, game):
          
          return Players._read_objects(MlbamUtil.find_xml("".join([url, cls.FILENAME]), markup) ,game)
docs: read xml object
          :param url: contents url
          :param markup: markup provider
          :param game: MLBAM Game object
          :return: pitchpx.game.players.Players object