2021 NFL MVP: Matthew Stafford and Kyler Murray lead the way ahead of NFL Week 10 | NFL News, Rankings and Statistics | PFF

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2021 NFL MVP: Matthew Stafford and Kyler Murray lead the way ahead of NFL Week 10

1. Cardinals (1): Don't believe in the league's only unbeaten team? Arizona also boasts the NFL's largest point differential (+111), is the toughest team to score on (16.3 points allowed per game), is getting defensive reinforcements off the COVID-19 list -- including OLB Chandler Jones -- and is already effectively integrating new TE Zach Ertz, the first player to catch a TD pass in successive weeks ... for different teams. Oh yeah ... and Kyler Murray. Syndication Usa Today

Week 9 wasn't particularly a banner week for the NFL MVP favorites, as the front-runners either had a bad on Sunday or didn’t play at all. With Kyler Murray, Tom Brady and Aaron Rodgers sidelined due to various reasons and Matthew Stafford, Dak Prescott and Josh Allen having days to forget, Justin Herbert and Lamar Jackson seized the opportunity and stormed back into serious MVP contention.

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Before we get to the Week 10 NFL MVP rankings, here's a short overview of the methodology:

We trained a model to predict the winner of the MVP award based on only three regular-season parameters after Week 18 concludes:

  1. The number of wins and how that ranks across the league
  2. Rank in the division
  3. Expected points added (EPA) per play and how that ranks across the league

Since the model works with regular-season stats in hindsight, we need to simulate the remaining games of the season to find results with which we can feed the model. So, we utilize PFF's weekly win total simulations and a Bayesian updating method to simulate each quarterback’s EPA per play.

During the season, we update our beliefs on all quarterbacks with Bayesian updating, incorporating up-to-date EPA per play and making adjustments based on PFF passing grade, our charting data — which can identify plays with bad results that aren't the quarterback's fault — and the quality of defense faced.

Using these updated beliefs, we can simulate the EPA per play for the remainder of the season for each quarterback.

The number of wins and whether a QB wins his division is obtained from our weekly win totals simulations.

The goal isn’t to describe who would be MVP if the season ended right now, but rather to predict who will have the best combination of individual stats and team wins at the end of the season.

Defense adjustments

First, we adjust for each defense to find which quarterbacks played the most difficult schedule (and receive the highest positive adjustments). Since it’s still early in the season, the defense adjustments are based on both opponent-adjusted performance this season as well as a prior from the offseason. With each passing week, the prior will play a smaller role and will be fully disregarded after eight weeks of play.

The defensive strengths of the teams lead to the following adjustments for quarterbacks (a positive adjustment means a difficult schedule so far; a negative adjustment means an easy schedule):

Of course, it’s also interesting to look at future strength of schedule based on the current strength of defenses. In this chart, a positive number means an easy future schedule (i.e., the team and its quarterback is supposed to generate more EPA due to playing easier defenses):

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