Which player should i drop?

Ryan Doumit, Felipe Lopez, and Shaun Mar. Im keeping 2 dropping 1. Doumits my 2nd catcher backing up Miguel Montero. Lopez is my 3rd second basemen on the bench and i have Brandon Phillips(2B) and Asdrubal Cabrera(Util). Mar would be my only back up pitcher. I have 4 bench spots. Which two should i keep?