Josh Heupel was 7-5 his first year as OU's QB in 1999, after 12 years of being terrible.
The following year they started 4-0 before their first ranked match in a brutal stretch of 4 games vs #11 Texas. They won that game 63-14.
The following game they faced #2 Kansas State and won 41-31.
The very next game, they faced #1 Nebraska, a team they lost to by a score of 69-7 the last time they played. They won this time, 31-14 to become 7-0 on the year.
Two weeks later, they played and defeated #23 Texas A&M 35-31.
This sounds a whole lot like what's happening at UT right now. Finished last year 7-5 in the regular season. Start this year 4-0 and then face a brutal 4 game stretch of top 25 games, including battles with the #1, #2, #25 & #13 teams.
Could history repeat itself?
Heupel had meetings with his teammates after the 1st season, putting out his plan on how they are going to win each game and finish as National Champions. After the past 13 years as a mediocre or bad team, no one ever expected they would win a national title, but Heupel believed it and prepared for it, the same as he's doing here.
Heupel is also in his 2nd year as HC, the same as Stoops @ OU when they won the title back then.
*this is pretty much a synopsis of an article in "The Athletic". It's not word for word, just my interpretation of the article.