Is Jim Schwartz's job on the line?

I have yet to place Detroit Lions coach Jim Schwartz on my weekly coaching hot list this season. There was little reason to do so, since the team started off 6-3 and pushed their way to the top of the NFC North. However, they have lost three of their past four games -- beating only the Aaron Rodgers-less Green Bay Packers -- so while his seat may not be hot, it may be warming up.