‘Parsons, whose 12½ sacks are seventh in the league, is Problem A among the many problems the Cowboys’ defense presents. First, you have to find him. Left end. Right end. Over the center. Maybe even off-the-ball linebacker. Second, you have to block him. And third, you can’t forget about his teammates while devoting attention to him. “We have to make sure where No. 11 is at all times,” Bills quarterback Josh Allen said. “But he’s not the only guy on their d-line that can go.”’