Oh, I agree that "CJ will get 20-40 yards when the line gives him a big hole" and that's the main problem, the OL isn't making those big holes.

That said, on the majority of 3rd or 4th and short, when the play call is to run it, CJ has been the chosen RB to attempt it. Unfortunately, he has failed way more than succeeded at gaining the neccessary yardage to convert... and yes, the OL has a lot to do with it. I too hope they correct (or have corrected) the problem, it is a big problem.