The D was moving well in the first Q. Turay missed a sack on the first TD. In the 2nd Q they became a step slow. Don't bother watching the 2nd half.
The d was on the field for most of the 2nd Q. OSU had long drives and RU had 3 and outs. If the O can hold the ball longer, pick up some first downs, change field position and let the D rest the D would actually look ok.