According to FootballOutsiders.com, really the only place to get O-line stats, we're the 2nd worst.
In run blocking, we're 31st in the NFL, with 3.22 adjusted line-yards per carry -- only 0.01 higher than KC.
In pass blocking, we're 29th in the NFL, allowing (adjusted for opponents' pass rush strength and situation) a sack on 10% of pass plays. Green Bay is the worst at 11.7%.
If you combine the rankings for overall run and pass blocking, we're tied for the worst o-line in the NFL w/ KC.
In run-blocking sub-categories, we're 29th in the NFL between the tackles, 31st off right tackle, 31st off right end, 32nd off left tackle, and 7th off left end; all these stats are adjusted line yards, so big runs don't count.
These running subcategories reflect Sigletary's cognitive dissonance in regards to the running game. We run in-between the tackles 72% of the time, more than any other team (tied w/ JAX), yet we continue to do so despite failure.
On the bright side, I think that the coaching staff has finally realized how terrible the O-line is run blocking inside and started implementing these pitch-out plays to gore that were very successful vs. TEN.
I think that the pass-blocking will improve with continuity as the season progresses -- pass-blocking is hevily dependant on a unit playing together. However, hope for the run blocking game is dim. Perhaps some draw plays will help.