Demetrious Johnson.–ONE CHAMPIONSHIP PHOTO MANILA, Philippines–Demetrious “Mighty Mouse” Johnson is going out on top. The legendary ONE Flyweight MMA world champion, considered by many as the greatest MMA fighter of all time, called it a career after an illustrious 18-year professional run that saw him collect all the titles that he can get from all over the world.Article continues after this advertisement He fittingly made his emotional announcement in ONE 168: Denver on Saturday...
