Great reply from John Wagner, but I call BS. If you walked on the field after the game, it was clear the turf between the hashmarks was a disaster. Not only that, much of the field was dead, dry grass, painted green. Even if it wasn't Houston, they had to have known they had a problem. In previous years the field was like a putting green. This year it was more like an undulating sand trap. Bohl expressed concern before the game, and we're lucky there weren't more injuries. Heads should roll.

From the Rose Bowl article linked above:
You're wondering, probably, how it will stay put for the BCS game, since it's sod atop sod, and there's no way it can root. The simple answer: sheer heft. The rolls are 50 feet long, three feet wide and a brick-like three inches thick.

They weigh more than your Kenmore and nothing — not a fullback's karate kick or a tuba player's stutter step — could ever unseat it.
The key for the grounds crew is to get the seams jigsaw tight, so the whole quilt becomes one.
Guessing that some bean counter decided it cost to much to replace the sod, again.