Cody McKenzie returned from self-imposed mixed martial arts (MMA) retirement tonight at WSOF 18 against Andrew McInnes. And it was ugly. McInnes was seen pulling McKenzie's hair to pull him into a triangle choke and was also warned for a headbutt. But, toward the end of round one, it was McKenzie who was disqualified after delivering an illegal headbutt, one that was undoubtedly frustration-fueled. Nonetheless, it's typically the dude who retaliates who gets caught. He should have known better, too. For complete WSOF 18 results click here.