There not invincible and rather lucky should have 4 losses. Injuries can happen anytime and derailing them look what happened to the 49ers. It ain’t over till it’s over. They can easily lose to Buffalo and the 49ers.
In that scenario, we'd still have to win out or only lose to Detroit on top of beating Philly ourselves.
Basically here's the scenario assuming the Eagles won't do something dumb and lose to the Giants.
- We have to beat Philly in a few weeks, obviously.
- Philly needs to lose at least two of these games - San Fran, Seattle, Cards, Buffalo
- Assuming they lose two of those games, we have to go 7-0 or 6-1 with the only loss to Detroit.
If we win out and Philly loses to us and then two of those games, we'd finish a game clear of them.
If we lose to Detroit only, and Philly loses to us and 2 of those 4 games, we'd win the division because we'd win the common games tiebreaker (losses to only San Fran and Cards, where as the Eagles would have lost to the Jets and then two more games).