Benintendi is a Gold Glover in left field, so that's where he would always play. Yelich would be the one to DH against right-handers. In terms of cost, something like Gray or Zamora would be about fair value, maybe even a little less. As far as Cain, a DFA would be preferable; otherwise, he can be the fifth outfielder a la JBJ and serve as a late inning defensive replacement and pinch runner.