Live Chat: Jon Jones. Brock Lesnar USADA tests, UFC on FOX 20 preview and more

UFC heavyweight Brock Lesnar and Jon Jones have been flagged by USADA for potential violations, Lesnar both in and out-of-competition. So had Chad Mendes. UFC on FOX 20 is this weekend as is Bellator 159. We'll talk about these issues and more on the Promotional Malpractice Live Chat.