BEMIDJI — On May 11, Nate Schwinghammer was preparing for one of the biggest fights of his young boxing career. He never expected to be in that position four years ago. As a freshman at Bemidji State in 2022, Schwinghammer was a defensive end for the football team. He was looking for something fun to do outside of football when he discovered boxing at the Bemidji Boxing Club. He would see familiar faces, like former Bemidji High School resource …