When I think about Eagles defense, I see Reggie White overwhelming blockers to get into the backfield and punish the quarterback. Maybe I see William Fuller storming off the left side to come up with another sack. Or that could be Clyde Simmons, Hugh Douglas or Trent Cole flying off the right side to get the quarterback. Maybe it's Jerome Brown flying up the middle to ruin a play, or Andy Harmon or Corey Simon.
All of those players were defensive linemen who thrived in the 4-3 defense. They attacked when the ball was snapped and made it their mission to get to the running back or quarterback.