Chael Sonnen (born April 3, 1977) is an American submission grappling promoter, mixed martial arts (MMA) analyst, and retired mixed martial artist. Beginning his MMA career in 1997, Sonnen competed for the Ultimate Fighting Championship (UFC), where he became a top contender in both the light heavyweight and middleweight divisions and challenged for both the UFC Light Heavyweight and UFC Middleweight Championships. Sonnen has also fought in World Extreme Cagefighting, Pancrase, and most recently for Bellator MMA. Sonnen is often considered one of the best mixed martial artists never to have won a major MMA world championship and one of the sport's greatest trash-talkers.