Last year Conor McGregor sat cage side as Charlie Ward, a team-mate from his gym in Ireland, defeated Portuguese fighter Joao Carvalho via third-round TKO.
Unfortunately Carvalho would be rushed to hospital shortly after the bout and would later die from his injuries.
"It's f----d up,' McGregor said in the new issue of Mens Health. 'I wasn't just watching that fight. I helped train a guy to kill someone, and then someone wound up dying."
A portion of the interview, which features McGregor on the cover was given to DailyMail.com.
'This is a f-----g dangerous game. People call it a sport, but it's fighting. I'm just making sure it ain't me. And that's f----d up.'
The incident fueled the drama surrounding McGregor's "retirement", refusal to attend a UFC media event and the removal of the rematch between McGregor and Nate Diaz from UFC 200.
The rematch was rescheduled for August 20, at UFC 202 and has, so far, gone off without a hitch.
(Photo by Amy Kaplan)