Week 15 Vegas NFL Power Rankings

Updated: December 13, 2011, 12:55 PM ET
By RJ Bell

Each week, an elite group of bookmakers and professional bettors provide Pregame.com with their private power rankings. These numbers literally influence the worldwide sports-betting market -- and together form the Vegas Rankings. Four categories convey what the "experts in the desert" truthfully think about the teams:

TRUE POWER: How good Vegas thinks a team really is.
HOME-FIELD ADVANTAGE: The value of each team's home field.
BETTOR BIAS: How many points the public overvalues (positive numbers) or undervalues (negative numbers) a team.
POINT-SPREAD POWER: The combination of True Power and Bettor Bias.

To calculate the projected winner of any matchup:

Take True Power (home team), ADD Home-Field Advantage and SUBTRACT True Power (away team).

To calculate the projected point spread of any matchup:

Replace the True Power with Point-Spread Power (which includes Bettor Bias, just like the actual Vegas line does).

Biggest Improvement -- TRUE POWER

Philadelphia Eagles
Arizona Cardinals
San Diego Chargers
Seattle Seahawks
Jacksonville Jaguars

Biggest Drop -- TRUE POWER

Tampa Bay Buccaneers
Buffalo Bills
St. Louis Rams
Miami Dolphins
Dallas Cowboys

Here are the Week 15 Vegas NFL Rankings: