When you try to play a football season during a pandemic, you can expect a lot of unusual results. A quarterback can set a rookie record for touchdown passes in only 15 games. A wild-card team that lost to both Nick Foles and Jared Goff can go on to win the Super Bowl. And offensive line continuity—often considered a necessity for point-scoring around the league—can fall all to hell.
Offensive line continuity scores were originally developed by Jason McKinley in the early days of FO (when FO Almanac was still Pro Football Prospectus) and we have subsequently gone back and calculated it for every team since 1999.