This year, the impossible finally happened.
A Group of Five team in the the form of the Cincinnati Bearcats crashed the College Football Playoffs. It took an unusual set of circumstances but it finally happened. It seems like every year, there is a G5 team that goes undefeated (or close to undefeated) but they get snubbed by some Power Five team that has a better pedigree.
Last year, the Cincinnati Bearcats went undefeated, but they ended up at number 8 in the College Football Playoff Poll that determines the seeding. The year before, the Memphis Tigers went 12-1 and that was good enough for #17.