The bowl game rankings used rank at end of season, not time of game. By going back to the ranking at the time of the game, Bronco's record improves to 5-13 vs. top 25.

In 05, BYU lost in the bowl game to an unranked Cal team, who then ended the season ranked 25
In 09, BYU beat a ranked Oregon State, who then fell to unranked in the final
In 13, BYU lost to unranked Washington, who then finished ranked 25