Upsets have run rampant through the 2013 college football season, leaving several teams as underachievers and numerous others as overachievers.
After their win over Texas A&M, the Auburn Tigers emerged as major overachievers, as few gave them a chance in the SEC before the year began.
Across the conference from Auburn, the Missouri Tigers have gone on an undefeated run through the first eight weeks despite notching a losing record in their first year in the league.
The wide-open Big 12 also provided a perfect scenario for a pair of dark-horse teams to rise while a few previous favorites have fallen.
Finally, one ACC team has made it back up near the level that made it an elite program years ago.
Note: All team rankings based on the Week 9 BCS standings unless otherwise noted.