Steelers could get wideout help from Heath Miller, Tyler Grisham

The fact that the Steelers sniffed around Plaxico Burress and Jerricho Cotchery suggests that the team isn’t completely thrilled with its depth chart at the position, even though four of the options (Hines Ward, Mike Wallace, Emmanuel Sanders, Antonio Brown) seem to be pretty solid. The Steelers nevertheless hope to boost the pass-catching corps.  “Looking…