Last minute Running back advice?

RICE. But a tough question, man. Smith hasn't proven himself yet (he killed me last year). Rice is a sure thing or as close to one as you can get. Smith will be amazing one of these days, but he's too risky in Week 1, especially against a team that wants to set an example in their first game. DET will be eviscerated. Rice has a favorable match-up against DAL's run-D and should be good for roughly a 100 yards and a TD. Wait on Smith for another week or two until you know what he can do on a regular basis. You already know what Rice is consistently capable of.