Because they have improved, and sometimes, defenses have good games, while running backs have bad games.
If they played Seattle 100 times, last week's results would happen maybe 5 times.
actually- i think it would be the other way around. like 95/100they manhandled seattles running game and i think they can do it to a lot of teams
IF they play with that kind of fire. Detroits offense is gonna have to be better at keeping drives alive, last years run defense would have been better statiscally but if you figure all the three and outs that they had, not to mentioned getting behind in virtually every game