Not really a nose tackle, a defensive tackle, look at the Jags. You can change the assignment of the DT based on the defensive play call. The guys that do this in 4-3 defenses are defensive tackles. Booger McFarland is a defensive tackle....6'0, 300lb We lack a pass rushign DE that good 4-3 systems have, but we'd still be better off with more beef up front right now. WE'd play the run better if we did.
