This is a great point, and Im a Raider fan. It starts up front. Carr gets shaky when he is pressured(hence his sub par games against Chiefs and Broncos), but when he gets his time he is money. Nebraska has not focused on their OL, but seems to be all in on these receivers etc. Build the OL.
Id also like to point out that Riley is not the coach to take us to the next level. Chip kelly is.