Karlos Williams

Is there some reason that I'm missing as to why this guy isn't a Buc? We have the need and he has the familiarity with Jameis. I understand that he came into camp a little overweight but I'm sure he's back in top shape by now. He's done with his suspension and we could really use him even when Doug comes back. Sims has proven he should be used basically strictly as a passing down RB.