They still managed to win last year with the Pache/Rojas playoff OF in the games where they did it, and they wouldn't have played all three of those guys yesterday if the roster was full.
But I'm fairly confident it will be an entirely different LF in October, even if they do keep one of Pache or Merrifield on the roster. I hope Whit is gone, and they really do need to ditch both because they'll also need a LH bench bat (even if it's just Clemens or Dahl). Though they can go with a five-man bench in the first round.