OP, this isn't a dumb topic. But I think the idea was considered and discarded. I'm sort of surprised they haven't tried him in that role in some packages. It seems like the kind of thing RR would do. It might just be the learning curve for him at ILB is steep enough.
When asked whether Jason Garrett is the right head coach for this team: "I don't think there is anyone else that could. I think he is an unbelievable coach. We've responded to him and he has made us better football players, better people. If you watch us I think we play with a certain relentless spirit." --Sean Lee