In sports history, in basketball, there have been teams that lost many games that took fire late in the year and went on to qualify for the tournament and then went to the final four or won it all. They created momentum.
You can change momentum any time you want; it's a mental thing.
You can say: "Two or three plays and a couple less turnovers and we're 11-0 [because that's what the truth is]. It's a great year we're having; we're a championship-level team and all we have to do is play like it for 4 quarters."
The fact is if BYU wins against Houston on Saturday there's a good possibility they are going to be in the conference championship, and then all bets are off - if they have the right attitude.