1. Defensive struggles--For the most part the Sooner defense hasn't been terrible, but it's given up the big play numerous times in the first five games, and that's a big reason why OU ranks 93rd in the NCAA in total yards given up. The Sooners have surrendered 411.6 yards per game, which ranks below the likes of Ball State and Troy. OU has to get better in this area.
2. Getting out-gained consistently--If someone said before the season OU would have fewer total yards of offense in four of its first five games and win all five, people would have thought that individual was crazy. But that's just the case. Only against Florida State have the Sooners had more total yards than an opponent, when they had 487 yards to only 344 for FSU.
3. Rushing attack rank--This isn't a huge concern because the offense has gotten the job done for the most part when it has needed to, but OU only has 607 rushing yards to its opponents' 817 through five. The Sooners rank 90th in the nation at 121.4 yards per game, so they definitely could be more productive there.
4. Lack of killer instinct--Only in one game have the Sooners delivered the proverbial knockout punch, and that was against the toughest team so far on their schedule, Florida State. In each of their other four contests OU has led by at least 15 and won by only one possession. The Sooners need to take these opponents out when they have them on the ropes.
5. Injuries have sidelined some Sooners--Defensive tackle Casey Walker suffered a sprained left knee, and he will not return for the next game, and a few other Sooners have went down along the way, including linebacker Austin Box and freshmen running backs Roy Finch and Brennan Clay. The good news here is Box, Finch and Clay will all return for the next game. But these guys have missed some valuable time, especially the freshmen, who don't have experience at the collegiate level.