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

This is the Promotional Malpractice Live Chat.
Well, here we are. It's after UFC 200 and we've got a number of notable drug test failure. Potential violations, mind you, but test failures just the same. Brock Lesnar has tested positive both in and out-of-competition, apparently for the same substance. The same substance, mind you, that Jones also tested positive for. However, there's another substance on top of that he's also tested positive. What to make of this? It's not clear yet, since the d