The secondary has been good at preventing the big play, but we've had corners biting big on play action and playing extremely soft coverage in the middle. That soft coverage is what allowed OU to convert 1st and 45 or whatever disgusting number that was. Good quarterbacks can take advantage of it, especially if they have time to get through all of their progressions. If our linebackers were a threat in pass coverage that would help, but they're just not.
They have been very good in run support, and improved in tackling from last year.