Dallas rolling. The ultimate measure will be postseason success, but it’s hard to imagine a much better start for Dallas. Its defense under Dan Quinn looks like the NFL’s best with Micah Parsons leading the way. The team’s scored 70 points already in two games and enters Sunday at Arizona as a 12.5-point favorite. In a league built on parity, Dallas’ point differential (plus-60) through two games was twice the next-closest (San Francisco). That’s a pretty good way to open the season, though they suffered a big blow this week when star corner Trevon Diggs tore his ACL in practice.