Olympic wrestling champion Gable Steveson will make his mixed martial arts debut next month, the latest turn in a winding career path that has seen the American compete in pro wrestling and sign for an NFL team.Steveson, who won a gold medal in the super heavyweight category at the Tokyo Olympics four years ago, will fight in a Legacy Fighting Alliance (LFA) event on Sep. 12 in a heavyweight bout with Braden Peterson in Minnesota.A number of Olympic wrestlers including Henry Cejudo and Daniel Cormier have successfully made the shift into MMA, in which grappling is a key component.