I was starting to wonder if I heard what I thought I heard. I went back and listened to the ROB podcast again. Seth Cox mentions that we're at the bottom of the Pro Football Focus Pass Blocking Efficiency rating at 69.5, which he says is the lowest in the history of the rating. Pro Football Focus mentions it here in the Cards/Hags preview article:
https://www.profootballfocus.com/blog/2013/12/20/3tfo-cardinals-seahawks-week-16/. But they also mention: "they have played better in recent weeks, coinciding with the Cardinals’ recent resurgence." Wow, we must have really played bad in the first half of the season, if our recent "resurgence" couldn't get us out of the cellar.
That is a huge gap between the two sources: from worst of all time to 16th in 2013. I wonder what accounts for that difference. Okay, here's Football Outsiders:
http://www.footballoutsiders.com/stats/ol. Yup, we're ranked 16 there in Adjusted Sack Rate at 7.3%, which is "Teams are ranked according to Adjusted Sack Rate, which gives sacks (plus intentional grounding penalties) per pass attempt
adjusted for down, distance, and opponent." So it sounds like Football Outsiders adjusts for strength of schedule. And this makes sense. Look at the defensive fronts we've faced: Carolina, the Rams twice, San Francisco, Seattle, New Orleans.
Pro Football Focus's Pass Blocking Efficiency
- https://www.profootballfocus.com/about/pff-signature-stats/ - "Making full use of our snap data and pressure tallies, plays spent in pass protection are compared to the total number of QB disruptions allowed by each player. The Pass Blocking Efficiency (PBE) formula
weighs sacks a bit heavier than hits and hurries and produces a rating that reflects the most efficient pass blockers on a per-pass-blocking snap basis with scores closer to 100 being best." So they take into account hurries and knockdowns, without adjusting for strength of schedule and game factors. So there's the difference. But yeah, it sounds like the Football Outsiders numbers would provide a more accurate overall picture, considering that they adjust for opponent and game situation.
Funny, look at who they mention in their example: "Example: Part of the offensive line unit that finished second in Pass Blocking Efficiency (behind only the New York Jets) in 2010, former top pick Jake Long led his Dolphins teammates by working the blindside edge to a personal PBE of 97.2; allowing just 21 total pressures on over 600 pass-blocking snaps.
In a similar number of snaps, Cardinals OT Levi Brown surrendered 70 (91.0 PBE)."