Obviously, Allen will need to work diligently to prove that he can hit at the major league level.Even if he doesn???t win the first baseman job, he???d still have to have a solid batting average in order to land the designated hitter role.After all, what good is a player who can hit prodigious home runs if he can???t do so at a moderate clip?Jack Cust, anyone? 2012 outlook: Allen will win the firs