When a player has a big game in Week One, it is easy to get carried away. For some, the big week will indeed be a sign of big weeks ahead. But for many others, it will turn out to be a flash in the pan.
Here are some of Week One’s N.F.L.-leading performances, and a look at the chance of a repeat in Week Two.
Philip Rivers, Chargers: 404 yards passing against the Lions.
Is the statistic sustainable? Yes. Quarterbacks threw for 400 yards 11 times last season, according to Football-Reference.