It is only intentional grounding when the passer throws to an area where there is no receiver if the passer is trying to conserve yardage or time. I don't think Young was avoiding a sack on the throw that the receiver broke off on (rare for this game) and it would be hard to conclude that he made the throw to conserve time.
Did the AU radio guys know this rule?...
Did the AU radio guys know this rule?...