ESPN Boxing Ringside Analyst, Atlas, says that McGregor cannot beat Mayweather, even with years of training.
First off, I wouldn’t [train him]. He has no chance in a traditional boxing match. His only chance would be with MMA rules, where he could try to bring Floyd to the mat where he could — of course — easily be the victor. He would need about five years — and I’m being very generous and conservative — of boxing training and experience to even entertain the thought of being competitive with any A-plus-level boxer…If I did train him, at this point I’m not sure what I’d have him do, but I’m sure of what I would not have him do: I wouldn’t have him just attack like the caveman he tries to act like. Being aggressive [although there are many who would believe that is his one and only chance] would not be my advice. He would simply bring on his demise quicker, and you don’t attack a great defensive counter puncher, especially when you are so crude. I would have [him] try and get Floyd to come forward. Teach [McGregor] how to step back and counter, hoping to get Floyd to perhaps be so overconfident that he might be drawn into a trick punch. In other words, a sneak punch.