CHAMPIONSHIP GAME - Who to start at RB?

The KC D gives up about 45 more yards per game on the ground than the other 2 D's, but the big difference is rushing TDs. The Chiefs have already given up . I think Brown is the last option of the 3, but they all could be good. NO is only giving up 22 compared to 11 for the Jags and 12 for NO. I do like what Smith has done this year; he helped me into the finals last week in one league and the Lions are still trying. Brown has the best matchup by far though. If you were playing two of these guys, Smith would be my second choice.