Helmets, arms and shoulders hinder his vision, but Aaron Donald bulldozes his way through double-team after double-team. It’s the first half of a Week 4 game against the Minnesota Vikings. Donald has yet to sack anyone in this game, or this season. He isn’t worried, though. By the fourth quarter, the All-Pro defensive tackle of the Los Angeles Rams has had enough. He eyes QB Kirk Cousins and prepares to strike. NFL quarterbacks fear getting sacked by Donald in the same way ordinary people fear getting older: They know it will happen, and they know they can’t do much about it.