Yes I'll take any stat showing the Rams #1, but in my usual Debbie Downer role I have to point out we don't have the data, it's impossible to put any meaning to a stat without context. There are just too many possible reasons to why the Rams were great on these plays other than just simply "they are the greatest pulling linemen team in the NFL and Schotty sucked for not calling it more". Even if I'd love to agree with both sentiments.
I suspect the #1 reason is small sample size. Then there's the set distribution -- is it consistent big chunk plays? Or a bunch of 3 yard fails then one huge home run TD that skews the average? Then there's other variables like opponent quality, field position/time of game context, type of play, etc...
The type of play is important to even tabulate this data. What does PFF deem, in their infinite wisdom, a "pulling backside OL"? Break it down -- what do they consider "pulling"? A set assignment in a power scheme? A pin-pull zone block rule? Does it have to be a lineman pulling all the way across to a playside gap, or if anyone backside pulls just one gap (even if that gap is still backside) does that count? Is the center always counted as backside or omitted? What about a draw play up the middle, do we judge if the pulling man is "backside" based on whether the play call is the 1 or 2 hole, or which side the RB ends up running to?
This minutia might seem overkill but if you're talking a sample size of perhaps 20-25 runs then 1-2 differences in all these classifications can skew data very quickly. Sincerely yours, Buzz Killington.