4-3, I think it provides more consistent pressured, and is an easier scheme for players to play in.
It's difficult to ask a linebacker/defensive end to play in coverage, run defense, and pass rush.
A 4-3 defensive end doesn't have to worry nearly as much about coverage.
This means you can get players out of college who know pretty much what they need to do, and not learn a new position, and then at times learn another position.
How many linebackers have we drafted who have gone in and outside. This stunts growth, and it's why we don't have defensive players step up very quickly on this team.
In the final two months of 2011, Romo’s passer rating was 115.9.