In regards to Martinez, some of my most memorable images of him involve him running the football, getting hit awkwardly and seemingly just dropping the ball at this feet. Whether he was coached to do it or he was doing it himself, he didn't get tackled well. It's like he would get rigid.
I dig into our offensive/defensive lines a lot when criticizing the current state of Husker football, and they're still a big deal, but it's been a long time since we had a quarterback who protected the ball well.