Three things that can go wrong …
1. Bills establish a running attack. Buffalo has averaged 4.8 yards per carry, which is fifth-best in the NFL. The Ravens are giving up 4.3 yards per attempt, which is 21st in the league.
2. Buffalo goes deep. Lee Evans, Roscoe Parrish and Steve Johnson have all caught touchdown passes over 30 yards. Of course, Ed Reed will be roaming in the secondary Sunday.
3. Ravens look past the winless Bills. The Ravens' track record says this shouldn't be a concern. But if the Ravens were going to suffer a letdown against any team, it would be the Bills, who have been outscored 161-87 this season.