Live Chat: UFC 220 & Bellator 192 Preview, Jon Jones Polygraph And More

UFC 220 and Bellator 192 are this weekend, which makes it a big one in mixed martial arts (MMA). Stipe Miocic is facing Francis N'Gannou, Daniel Cormier defends his title against Volkan Oezdemir, and more. Over at Bellator, Douglas Lima defends his title against Rory MacDonald, Chael Sonnen faces Rampage Jackson and more. We'll break down these cards and fights. Plus, Jon Jones allegedly passed a polygraph. What good is that and what does it mean for his future with USADA? We'll examine. This is the Promotional Malpractice Live Chat.