The Bengals are winners of their last three games, while the Chargers are headed in the opposite direction and are losers of their last three in a row.
Cincy is averaging 25.6 points a game, while San Diego is averaging 22.3 points.
The Chargers actually opened the week as 2-point favorites, but clearly the trajectory of both teams in playing a factor in where the money is going.
The teams are evenly matched, as the Chargers have the NFL's 16th-ranked offense in terms of points per game, while the Bengals boast the league's 15th-ranked defense.
In their last 10 games playing outside of the AFC North, the Bengals are 7-3, while the Chargers are 4-6 in their last 10 outside of the AFC West.
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NFL Week 13 Power Rankings (via sbnation)