Without a rewatch, I'm not certain, but some thoughts:
1. USC is a strong running team. Much stronger than we anticipated. OL blocked good. Backs were fast, shifty.
2. Screen game and short passing game had us on our heels. Then Riley would call 3 straight runs and we'd still be waiting on a pass.
3. Our LBs were not great today. I think it was the 4th quarter before one of them made a tackle in the back field.
4. 4-2-5 just seems to suck vs the run unless your DL dominates. We run a lot of stunt and gap change with our DL instead of playing gap responsibility and head up field.
USC played great today. Much credit to them.