The position has been a revolving door. Nebraska’s portal additions have the potential to bring improved production and leadership to Mickey Joseph’s group. New Husker associate head coach and wide receivers coach Mickey Joseph has a big job ahead of him. He’s tasked with stabilizing a position that has had as much turnover as any on the team during head coach Scott Frost’s tenure. Think about this: Between the 2018 and 2021 recruiting classes, Nebraska football signed 18 wide receivers. 2018: Jaron Woodyard, Andre Hunt, Miles Jones, Justin McGriff, Mike Williams, Dominick Watt.2019: Wan’Dale …