Mississippi State, Florida State and Auburn held the top three spots in the second College Football Playoff rankings, with Oregon joining them in the top four Tuesday night.Oregon moved up a spot from fifth in the initial poll by the 12-member selection committee. This was the second of seven Top 25 rankings until the end of the regular season and conference championship games.Mississippi slid from fourth to 11th after its second consecutive loss, 35-31 to Auburn. But the Rebels remained ahead of four one-loss teams from power-five conferences.Auburn is the highest ranked of the 12 one-loss teams in the rankings that will ultimately determine the national semifinals, and set matchups for the other four marquee New Year’s Day bowls that are part of the playoff rotation.Alabama was fifth, giving the SEC West three of the top five spots.TCU was sixth, a spot ahead of Big 12-leading Kansas State.