can read pg 2 without signing up - pg 1 doesn't talk about RBBC:
Maroney's burden is expected to increase significantly because Dillon is no longer with the team.
You don't have to sign up, just enter your birth year and zipcode.
As for the RBBC part, I'm guessing he's talking about this:
"Hold on, time out," the former University of Minnesota standout said after his first training camp practice. Nobody said anything about me being a feature back. I'm just getting a few more carries."