Al Michaels and Cris Collinsworth all but exhorted John Harbaugh not to go for it on fourth-and-a-long-1 from his own 43. The Ravens were leading the Chiefs 36-35 and the Sunday Night Football crew figured it foolhardy to risk giving Patrick Mahomes the ball on the wrong side of the 50 and a minute to go. But this is 2021, when conventional football wisdom has given way to a healthy heaping of analytics flavored with a dollop of hunch. The revenge of the nerds, if you will. No longer are notoriously risk-averse coaches viewing the 4 on the sideline down marker as a green light to automatically send out the punting team. Just last week, NFL teams went for fourth-down conversions a whopping 52 times, the highest single-week total in league history.