or actually in the Top 81, now that I look more closely:
Iowa St., USC, LSU, Auburn, and Washington. Four of those five had one stat-padding game vs an FCS opponent, in additon to two tougher games. And none of these four played two true road games.
USC is the outlier: they didn't play an FCS team, although they did beat up on UNLV. And they have played two true road games already, like BYU.
Anyway, I would expect BYU's statistical rankings to improve as they get deeper into their schedule and stop playing mostly road games vs P5 teams.