Ray Sefo is a 6 time Muay Thai World Champion and he also competed in the K1 World Grand Prix finals 8 times. He grew up training  Wing Chun before training Muay Thai. He had an unbeaten record as an amateur Oceania Kickboxing league. Sefo also holds a 5-1 professional boxing record.

Sefo trains with Xtreme Couture in Las Vegas. His MMA Record is 2-1 with a win in Strikforce and a loss to Valentijn Overeem in Strikeforce as well. In 2012 Sefo started a new MMA company called World Series of Fighting of which he is the president. They signed a deal with NBC sports to air 8 to 10 events. They have held 3 events so far and Sefo announced he would be fighting Dave Huckaba on the 4th event.