ESPN released it’s final Football Power Index for 2015 and it had Clemson football, not ranked second, but fifth in the nation. Here is what ESPN claims the Power Index is determined:
The Football Power Index (FPI) is a measure of team strength that is meant to be the best predictor of a team’s performance going forward for the rest of the season. FPI represents how many points above or below average a team is. Projected results are based on 10,000 simulations of the rest of the season using FPI, results to date, and the remaining schedule.