The narrative has long been that the offensive line of the Seattle Seahawks has held the team back from greater successes in the years subsequent to the team’s victory in Super Bowl XLVIII. The calls for firing Tom Cable and replacing him with a “competent” offensive line coach were common and loud, and now ESPN has developed a new metric to look at how offensive lines across the NFL perform.
In short, using the player tracking data the league makes available, ESPN has developed a proprietary system that tracks offensive line success rates at a level which, to my knowledge, has not been done before.