Similar to all of the front seven positions on defense, the inside linebacker means different things to 4-3 and 3-4 teams. A 4-3 inside linebacker will generally be referred to as a middle linebacker, and is often the captain of the defense. In zone heavy schemes, a middle linebacker will have a diamond or home plate shaped zone to cover. His responsibility will be to move forward and backward, and will most often be the player who gets plays from the defensive coordinator. In a 3-4, the inside linebackers often work in tandem. One will have the freedom to play instinctively and make plays, the other cleans up the gaps, taking on blockers so the other can attack.