Follow us on Twitter and like us on Facebook   Deadspin: Pirates outfielder Andrew McCutchen took a pitch to his back in Saturday night’s game against the Diamondbacks. On a 2-0 count, Arizona reliever Randall Delgado plunked McCutchen. It looked painful, but McCutchen wasn’t seriously injured. McCutchen was visibly furious, not at the beaning, but because of how it…