The fact refs can be and are subjective with these types of calls. If a ref thought the Oline had made contact with AD it may not have been called.

The one that gets me is the roughing call for driving the QB into the turf with your body weight. In the Lions /Jets game Stafford (who was horrible, maybe he had a concussion , he played like he didn't know where he was or what he was doing), twice he was driven into the turf by big dudes ,no flag.