The formation eventually caught the eye of current Fox analyst and former NFL Vice President of Officiating Mike Pereira. He dismissed any suggestion that the play should have been whistled dead. "Watch on any Sunday," he tweeted. "This is a good formation compared to many. They are not technical with this."

In other words, the "seven men on the line" is a rule on the books but one that doesn't require a tape measure and straight edge to determine if every player is precisely on the line of scrimmage. If seven guys are close to line and set, Pereira implies, then the formation is fine. The seven Broncos were close to the line and set, so there was nothing to call.