The man being hailed as 'The McGregor Slayer', Joeseph Duffy, was the last man to stop Conor McGregor at Cage Warriors Fighting Championships 40 in 2010.
'Irish Joe' used his grappling skills to catch McGregor with a savvy arm-triangle choke in the opening round, becoming the second man to conquer 'The Notorious' in the cage. Artemij Sitenkov also caught the interim featherweight champion with a submission in 2008.
In an interview with MMAJunkie on Wednesday, McGregor said he'd love to see 'journeyman' Duffy climb the lightweight ranks so he could knock him out in a rematch.