As emphasized by both Robert Saleh and Jeff Ulbrich during the offseason and training camp, the linebacker position is most important on their defense. With the implementation of a 4-3 defense, you will typically see the Jets’ base package consist of 3 “stack” linebackers (weakside, middle, strongside) that play over the top of the defensive line. The prototypical build for a 4-3 linebacker is 230-235 lbs. with reasonable speed and length. Each player must have the speed to play sideline to sideline, with adequate coverage and ball skills to get vertical with tight ends down the middle of the field.