I believe I was the first person on this site to point out a couple of years ago that almost all of Grant's long runs come off the right. My observation initially met with some skepticism, but gradually people started to realize I was right (no pun intended). Ever since, I grumble under my breath when I see Grant get stuffed up the middle, but I don't bitch too loud because I know the majority of his yards come up the middle. However, I pitch a fit whenever I see him clobbered to the left for a loss, because it's brutally obvious our team can't get anything done off the left, and I don't understand why McCarthy can't seem to see it.
The reality is, though, Grant is about as likely to get stuffed for little to no gain as he is to make positive yardage. Though it's purely an intuitive judgment (not backed with statistics as my above conclusion is), it seems to me that when the offense simply must get that last inch or two up the middle, they're almost better off sending Rodgers on a sneak as they are running Grant behind this line. I wish it weren't so.