Why is Gio not RB1?

[Millhouse]

I think Mixon should be the main back, and I am big Gio fan.

At the same time, I equally think the Bengals need to think outside their box in getting Gio more involved when Mixon is the main back. Just because he is listed as a RB, doesn't mean he should always be used as one with his receiving and open space skills he has.

The play below was 5 years ago. This is what Gio was capable of. Yet the Bengals over the years never thought outside the box in using him when instead they kept plugging Jeremy Runs in Straight Line Hill out there instead. So when I and others have said they under utilize Gio, it doesn't mean not under-using him as a running back, but under utilizing his skill set.