Someone, somewhere over the summer went into a Bed Bath and Beyond and broke every damn mirror in the name of TCU's defense. Adding insult to injury, quite literally, Ranthony Texada, TCU's best corner and second-to-last starting returner from last year who hadn't, in some capacity, been injured yet in 2015, went down for the season after a punkish offensive interference play.
While the defensive line and the linebackers will work themselves out just fine--Lathan won't be out for the season, and Pierson (and possibly Lathan) should be back this week--it's not an insane statement that TCU's secondary won't cause them severe problems.