NFL QB power rankings: The best and worst starters going into Week 15

Using a loose formula, we ranked all 32 NFL starting quarterbacks.

Our formula is based on two advanced statistics: Football Outsiders' DYAR metric and ESPN's total QBR metric. Between those numbers and a few other factors, including job security, recent performances, and sustained success in the past, we can get a good sense of how the league's most important players stack up to each other.

This week, Ben Roethlisberger, Philip Rivers, and Jimmy Garoppolo are up, while Kirk Cousins and Marcus Mariota are down. Below, find out where the rest of the starters stand.