Comparing two of the charting-based measures of offensive line play (SIS and PFF) and they align pretty well except for 3 teams (WAS-CHI-LV).

WAS & CHI make sense since they have QBs who hold the ball forever and thus generate more blown blocks (SIS measure). Not sure about LV pic.twitter.com/wzSZTTeWOP

— Computer Cowboy (@benbbaldwin) January 4, 2023