In the case of long term injury I use my minor leagues. My bench is for winning todays game. Engel, Garcia or Sanchez are all capable stand-ins for a few innings or a few games. I have also indicated in other posts that Grandal would make an excellent partner with McCann and Collins for added bench strength for whoever isn't catching or playing 1st base. I think it is silly to think that these guys have played full time roles with us suddenly can't contribute in utility roles.