Not only did these new additions impact the model, they were also part of the opponent adjustments for defenses. In addition, I had a second metric to capture how many new members of the offensive line would be starting a given week compared to the previous week. As such, I came up with my own metric, which basically measures how many consecutive weeks a team trots out the same five starting offensive linemen. While Football Outsiders has its own offensive line continuity metric, it is broken down by year whereas I needed something that would be available at the weekly level. This year, I added offensive line continuity as a variable. Last year, the big addition was incorporating Estimated Quarterback Time to Throw into the picture. Reminder, all data comes from Football Outsiders' game charting data (collected first by FO staff and volunteers, then in conjunction with ESPN Stats & Info, and since 2015 by Sports Info Solutions).Įvery year the model goes through an additional iteration, which inevitably shifts the all-time rankings up and down some spots as new information is added. For a more detailed explanation, see this link. It's calculated using a machine learning model that first predicts the probability of pressure from a set of variables, and then it is re-rerun with the opponent-specific inputs set to average, with the difference between the two accounting for the opponent. RAP is an opponent-adjusted metric for measuring a team's success at generating or avoiding pressure.

Now we're going to make things a bit more complicated. Over the last couple of weeks, Football Outsiders has run basic pressure rates from 2021. These numbers show Matthew Stafford enjoyed the best pass protection of his career en route to a Super Bowl championship with the Los Angeles Rams. As such, let us celebrate with yet another trip down recent memory lane as we visit the 2021 Rate of Adjusted Pressure Numbers, or RAP for short. NFL Preseason Week 2 - Guest column by Ajit Kirpekar

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