We’re down to the last weekend of college football before the conference championship games and College Football Playoff selection. And since last week, there’s a newcomer among the top-4 teams with the best chances to make the playoff. While Georgia, Ohio State and Michigan all won in Week 12, Tennessee — which previously had the fourth-best chance to make the playoff, according to ESPN’s Playoff Predictor formula — got destroyed by South Carolina and saw its playoff hopes vanish. The Volunteers fell in the latest playoff rankings and dropped out of the top-4 teams with the best playoff chances. Undefeated…