Conor's boxing has helped him knocks out dudes who are not primary boxers. But he is going to get humiliated by Mayweather. That means McGregor has not mastered Boxing. McGregor was also humiliated by Nate Diaz on the ground after being choked out. That means that McGregor has not mastered Jujitsu and cannot hang with top BJJ players on the ground. His wrestling still needs work as he was being steamroll by Mendes before Mendes gassed out. Obviously Conor has not mastered wrestling. McGregor is however a solid Karate stylist who has adopted well ibto becoming a solid American kickboxer. He would had been a really good American Kickboxer the likes of Bill Wallace and Dennis Alexio . American Kickboxer specializes in Karate style kicks while having basic boxing. Their boxing offense may be strong and fast but they lack the defense and tricks of actual pro boxers. Would you consider McGregor to be the greatest "Jack of All Traders and Master of Nada" or the greatest American Kickboxer to ever fight in MMA?