Good comments Mufasa. OU has a terrific offense, but such a so/so defense that I expect teams to challenge them. The key will be whether teams can defend Mayfield and his high powered attack. It's not something that most of these teams have faced.
But I really think that OU can be beaten, by Clemson, by Alabama or by Georgia....if the defensive secondary plays well.
Texas, for instance, gave up a ton of yardage against the Sooners, but came back from a 20-0 deficit to take a 24-23 lead. But for one play, letting the tight end get into space behind the secondary in the 4th quarter, we aren't talking about OU this week. And Texas was a 6-6 team, an inconsistent team that rode the back of a gutty freshman QB with a will to win that day. TCU didn't have that kind of offensive effort in either game vs OU. So their defense wore down. The Texas defense, which got better as the year progressed, gave up lots of yards but make some big plays against Boomer.
I think the defenses that OU faces in the semifinals and, if they beat Georgia, in the finals, are way better than anything OU saw all year. Harrass Mayfield and he gets flustered...see Iowa State game. But you have to be able to keep it up for 4 quarters. He'll make you pay if you don't