I'm not particularly worried about the Herd's defense. Against Rice, they performed well given the phenomenally bad positions they were put in because of a horrid kicking game, 5 interceptions, 3 failed 4th down conversions, and being out on the field for 37 minutes. I believe they held Rice to around 200 yards of total offense.
I'm much more concerned about Wells and the offense. UAB is going to do like Rice and blitz like crazy and keep the pressure on him. Either Wells can connect some deep balls to keep them honest and open up some lanes for Knox, or it's game over.
It's also hard not to shake my nagging suspicion that there's some locker room BS going on right now.