DULUTH — Minnesota Duluth will be looking for its fourth head softball coach since 2021 after head coach Nat Wagner was unveiled as a new member of the staff at the University of Minnesota on Tuesday. Wagner spent two seasons in charge of the UMD program, going 39-17 (18-8 NSIC) in 2025 and 30-24 (15-15 NSIC) in 2026. Wagner joins a Gophers staff with a distinctly NSIC flavor, as new head coach Gretta Melsted spent 20 seasons leading perennial p…