With all the data and statistics we have now, managers should really be using that to his advantage when looking at match ups. It's no secret that some hitters do well against a pitcher while others do not. Use the data to help you decide when and where to use your relievers. When it comes to closers, maybe that falls true as well but if you have 2-3 guys you're running out there in the 9th, you better be ready for those to always question you when it doesn't fall your way. If a closer blows up, its on the closer. If you're closer "x" blows up and you didn't use closer "y", now you have people going after you.