I know this issue has been covered extensively here on BE, but I was watching the fights last night with a friend who was a doctor, and he strongly suggested that the back acne we saw on several fighters, notably the McDonald's, was likely from steroids. I gently disagreed, noting that both of those fighters are in their early 20's and the back acne didn't definitively mean they were juicing. There were a few other fighters on the card who also had it, but I have to be honest, I am suspicious of Rory MacDonald. Any thoughts on this?