I hate to be the guy that says "Just put Espinosa in the OF" but with Harper on the DL, and Espinosa playing well, could Espinosa handle a few starts in LF? You can let Zimm play 3rd, and move Rendon back to 2B. You can still use Espinosa in INF when you rest Zimm's shoulder, and let Zimm start a few times at 1B while we rest LaRoche against a tough lefty.