That and the fact he is just thinking too much about where to run. Foreman is a big kid as well but what he does is get behind his pads and run threw folks. He doesn't dance around and hope to find a hole. He just run threw the design hole and if it's not open, he bounce. CW gets to the hole and run up high. He needs to lower his body and power threw. I don't see it as a problem. It's correctable but him changing position won't solve his problem. He is a RB, no doubt.Running upright should mean that he is actually running faster, but dude is slower than slow and still running upright. That should tell you what his real problem is.
He seriously needs to lose about 20 lbs or move to TE or defense. He isn't going to be an effective running back at his current weight, he is just too slow.