The issue is playing spread offenses, you're going to give up yards.
Who can move the ball well in the conference? Nearly everyone. Tech, Baylor, Ok State, OU, West Virginia,
Heck, even Alabama gave up 421 passing yards to Ole Miss a week ago and no one would dare question the defensive greatness of Nick Saban.
The goal is going to have to be creating turnovers and stops. Ignore yards because teams are going to get them. So if you're looking for the Texas defense to give up less than 300 yards per game, you will be left wanting more. What they need is to stop them from scoring every drive.
Cal had 15 drives. Here is how every Cal drive ended:
Touchdown
Downs
Punt
Touchdown
Punt
Touchdown
Touchdown
Safety (for Texas)
Touchdown
Punt
Punt
Punt
Touchdown
Touchdown
End of Game.
The ones in bold are the 2nd half drives. So half of the drives ended with stops. What did Texas do?
Missed FG
Punt
Punt
Touchdown
Field Goal
Punt.
So each team had 6 drives in the 2nd half. Texas scored twice and Cal scored twice (officially). Texas didn't answer efficiently as well. Left 3 points at least on the field in the second half. The first 3 drives of the second half, the defense only gave up 36 yards to Cal. That's pretty good. They just didn't close.
Cal scored touchdowns on 7 of their 15 drives (unofficially 8 since that touchdown was called back). We are going to get into shootouts this year in the Big 12. The defense needs to ensure that teams only score AT MOST on 40% of their drives. Plus, don't commit as many penalties. That's the recipe for success, but this is still a young team that will make mistakes.