As spring practice begins to come to a close, Inside NU will be embarking on a new series of stories regarding the most important questions for Wildcat football to address in the offseason. With coaches and players coming and going and potential position battles galore, Northwestern has plenty to focus on going into its season opener in late August. With these stories, we will highlight what we feel are the most important questions that this team is facing as they try to build on nearly unprecedented success. Next, we take on the run defense, which was arguably the most impressive part of the team last season but loses three linchpins.