Yeah it was the 2014 season…Oregon loss to a then Unranked Arizona team. Granted, they did beat the snot outta them in the Pac-12 title game, and AU was a top 10 team at the time of the rematch, but TCU’s lone loss was against a then #5 ranked Baylor team who finished w/ only 2 losses on the season. TCU had a solid S.O.S that yr & was an AP #3 at the time of voting. I think they should’ve gotten the nod over Oregon, but I think not having a B12 Championship Game, at that time, hurt TCU as they weren’t considered a definitive B12 champion, but a Co-Champion.
It could be also argued in 2010 they could’ve gotten the nod over Oregon to play Auburn in the championship game. That TCU team went 13-0 and played a solid schedule.