Forget about OJ, there might be some truth to that.
Zeke led the team in rushing (obviously) but also led the team in receptions, he knows what his value is to this team.
He`s trying to say that he is not only a RB (as Bell said last year), he`s the the most important piece for this team`s success, and I don`t disagree with him.
Now, what the market says is another thing, he needs to understand that QB`s are the stars and should be paid more than a RB, but it must be tough when you know that you are MUCH better at what you do than the QB you play with, and BTW, he will get paid much more than you.