We've not had a clear answer to that question since Lamar Miller. Burns has more potential to be the answer than MacFarland ever did, so I don't think losing Mac is the end of the world. Hopefully, one of our RB prospects for 2018 can be that powerful back, with homerun potential, who can also consistently gain yards between the tackles...Until we fill that spec, I think our offense will continue to be good/very good but not great.