New data shows that the 49ers give up more "short sacks" than any other team in the NFL, at a rate of 3x the league average. short sacks, defined as sacks under 2.5 seconds, are almost always on the offensive line failing to block (or a botched snap). In contrast, we've given up relatively few "long sacks" (coverage sacks), which are indicative of WRs failing to get open or the QB holding on to the ball for too long. In contrast, nearly all of the Rams' sacks are coverage sacks, with either Bradford holding the ball too long or WRs not getting open.
With an O-line like this, it's amazing we're 3-1 and it speaks volumes to the job our run defense has done and Alex Smith's ability to make lemons out of lemonade. The three teams that are directly better than us in short sacks are a combined 1-11 (SEA, MIA, and IND).