4. The Vikings Trade For Herschel Walker
Sure, in his first full season with the Vikings after they landed him in a 1989 trade, the Hall of Fame back amassed 1,085 yards from scrimmage and scored nine touchdowns. The team also went 6-10, and had given up quite the haul for the running back, including Emmitt Smith, Alvin Harper, Darren Woodson, and Dixon Edwards.