Perhaps he just needs volume to be better, I don't know.
ypc on small sample sizes (and yes those individual seasons would be small sample sizes) isn’t always as meaningful as they seem.
If one defender falls allowing a long run somewhere in there is he all of a sudden a better RB?
I’m not saying it’s completely meaningless - but both Cook and Mattison saw their ypc drop the last two seasons - meaning it could be an oline or playcalling issue. Maybe those things don’t change maybe they do.
When watching games I never noticed much of a drop off, if any, when Mattison was out there and they’ve clearly shown they believe in him. While Cook was still there they changes their social media banners to feature Jefferson and Mattison.
I expect to see whichever backup wins the job, Chandler or McBride, to see more of a role than what Mattison got when Cook was healthy - meaning some kind of split, but Mattison should easily be able to put up RB2 numbers in this offense.