By Matt Audilet Bruce Arians’ sudden retirement announcement on Wednesday night has speculation swirling around the NFL world. Could the head coach’s departure have anything to do with the return of Tom Brady? Brady’s former New England teammate Rich Ohrnberger certainly seems to think so. Back in February, Ohrnberger, who now works as an analyst for Fox Sports Radio, reported that the relationship between Brady and Arians was “souring.” Apparently, Brady and offensive coordinator Byron Leftwich were frustrated by the head coach undermining their offensive game plan. “The Tom Brady & Bruce Ari…