Duffy, who beat McGregor with a 38-second submission in 2010, says McGregor cannot beat Mayweather
I think in combat sports, there’s always a puncher’s chance. In MMA, boxing, there’s always that puncher’s chance…I feel that Floyd is probably used to getting in there with bigger hitters than Conor. Boxers, them boxers really do hit [hard]. On the scorecards, I really feel it’s a landslide towards Floyd. He’s one of the best of all time. How he made Pacquiao look — and Pacquiao is one of the best boxers we’ve seen in a long time — I think that just proves the level he’s at. Canelo’s probably a bigger hitter than Conor, [look] how he boxed him. It’s different. It takes a while to get into that sport, and to get up to par. I think if he pursued boxing for a long time, he could’ve done very well, definitely, but Floyd has been doing this since he was a child. I really just can’t see it going any other way.