It is difficult to go undefeated in college football. Only eight teams in the past five seasons have managed to run the table through the regular season, and only three of those teams -- Auburn and TCU in 2010, Florida State in 2013 -- followed it up with conference title and a bowl victory.
Twenty teams remain undefeated through the fifth week of this season, 15 of them from Power 5 conferences.
We calculated the likelihood that each will remain unbeaten through the regular season based on FEI ratings (scroll to the bottom of the story for an explanation of FEI ratings).
These might not be the 20 best teams in the country, but each can control its own destiny and play its way into a New Year's Six bowl game. Which teams have the best chance of doing so?