Which rb to start this week?

I wouldn't put too much faith in the projections - they aren't generally very accurate. Only 7 teams have given up fewer fantasy points to opposing RBs than the Dolphins. None of these guys is tearing up the league right now, but the Chargers and Lions are both among the 7 teams giving up the most fantasy points against opposing RBs. Go with the better backs and better matchups - play Jacobs and Jones.