Three things that could go wrong …
1. Kyle Orton finds holes in Ravens secondary. The Broncos quarterback represents the biggest test so far for a pass defense that has easily handled the likes of Mark Sanchez, Seneca Wallace and Charlie Batch.
2. Ravens' running game continues to sputter. The Ravens have averaged only 3 yards per carry, which is the second-worst in the NFL. Denver limited Tennessee's Chris Johnson to 53 yards Sunday.
3. The letdown factor. The Ravens are coming off a 17-14 comeback victory at Pittsburgh, which is one of their biggest regular-season wins under coach John Harbaugh. Bringing that same intensity a week later is perhaps the Ravens' biggest challenge.
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