Evaluating offensive line play in the NFL is a bit more complex than a lot of fans really care to dig into. It is generally accepted that if a team’s quarterback takes a lot of sacks, that team has a bad offensive line. If a team ranks low in rushing yards per game or yards per attempt, the line takes the lion’s share of the blame.
While there is a strong correlation between line play and performance in both of these areas, there is a lot more that goes into it. Consider that a quarterback who is able to get through his progressions quicker may be able to get the ball out quicker.