His point isn't that he is a back up. It's that he is a back up for a reason. Which is insinuating you take that information and put it towards not trusting him as much as a tried and true #1 RB in Morris. So you are being the dick here... use some abstract thinking here man.
Moving on, you do have an argument that Washington's offensive line is in shambles against a stout Miami D. At the same time...KC's defense is legit as well. So, since the defenses cancel each other out in my mind...I go with Morris.