Now through Week 12 of the 2019 NFL season, we at PFF have updated our power rankings using PFFELO.
Like any ELO system, it adjusts the ranking of a team after each game based on what happened in the game and the perceived strengths of the team and its opponent prior to the game. As opposed to most other ELO systems, PFF ELO doesn’t use the final score to update the rankings. Instead, we compute what the final score should have been based on the player grades. Thus the predictive power of our grades carries over to a strong predictive power of our ELO rankings, though we should note that other variables go into our season-long or game-by-game projections.