I think the Ravens are too good to lay another egg like they did against the Titans. That said, the injury situation is of concern.
The Ravens are obviously short at corner, and so the Rams will probably try to spread them out. And offensively, it doesn’t look like the Ravens can spread anyone out. If Lee Evans doesn’t play, the Ravens have one proven wideout in Boldin. The Rams will do everything to take away the run, putting 8 guys in the box, and dare the Ravens to throw to one of the rookie receivers.
I still think the Ravens have too much talent to lose, and too much experience to have a letdown, but against better teams (like the Jets in two weeks) this depleted line-up might be in trouble.