Here's a look around the big storylines in week 4 of the NFL season. All games are Sunday unless noted.
Eagles (2-1) at Tennessee, (2-1) 1 p.m. (Fox29)
The fact that the Titans were prepared to sit quarterback Marcus Mariota for a key divisional game last week against Jacksonville speaks to how injured his shoulder was. He came off the bench to get the win, but passed for only 100 yards. Mariota will have to make some plays with his arm. The Eagles' have a strong run defense. Tennessee has won 11 of its last 13 home games.