Joseph Duffy -- the last man to defeat Conor McGregor -- is the polar opposite of "Notorious."
Unlike McGregor, Duffy is quiet, reserved and prefers to keep to himself and his training, which is the reason "Irish Joe" doesn't offer rebuttals when his countryman takes aim at him in the media, questioning his commitment to his nationality.
But, when asked to give his prediction on a rematch between the two men, Duffy says it will be another quick victory for him, just like he 38-second submission victory he scored over his McGregor five years ago.