New Power Rankings
Our new power ratings have been in development since 2011. Designed exclusively for predictive purposes, these ratings improve upon the old ratings in several ways, most notably by incorporating a preseason rating for each team that improves early season accuracy.
Old Power Rankings
Our old power ratings were originally developed in 1999 by Mike Greenfield. They include both predictive and descriptive ratings. Depending on the sport, the old ratings typically need several game results for each team in order to calibrate effectively.