If BYU wants to have a realistic bowl shot it can't stumble here. The Cougars have lost consecutive games to Washington and Toledo on the road. There is no shame in losing to those two teams especially drawing the Rockets in Toledo. There would be tremendous shame, though, if the Cougars were to get upset by South Florida. 
I don't see that happening, though, even with BYU starting QB Zach Wilson out with a broken thumb.
The Cougars had a needed bye last week. Redshirt freshman QB Jaren Hall should be prepared. He's facing a Bulls squad that yields nearly 30 points a game ranking 93rd in scoring defense. 
BYU is bigger and has the more mature athletes. The Cougars have proven themselves with victories against Southern Cal and Tennessee. This has become a crucial game for the Cougars so their concentration, level of urgency and motivation should be there.