I don't think they necessarily mean he's going to get more carries, but they want him on the field more. You can't leave a linebacker on spiller which means it needs to be a corner or safety. If you put a safety on him then you don't have coverage deep. I think the point is that CJ being on the field creates mismatches and if he's on the field, he can make teams pay if they leave a linebacker on him and helps keep defense honest since he can run and catch.