Under fire: Drew Petzing bearing brunt of criticism for Cardinals' offensive woes

Drew Petzing is a lightning rod. Four weeks ago, he was the boy genius with the Midas Touch after the Cardinals routed the Rams. The past four weeks, it seems that everything the Arizona Cardinals second-year offensive coordinator touches turns to, well, you know.
Receiver Marvin Harrison Jr. has had an uneven start to his much anticipated rookie season. QB Kyler Murray is on pace to produce the lowest passing yardage output of his career. There is no vertical passing game to speak of, the Cardinals have converted 30 percent of their third downs over the past four games (12 of 40), and they have averaged just shy of 16 points in that span.
Remember all that talk in the preseason about the ar...