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Conor McGregor may be finding out that boxing is tougher sledding than he initially thought.
Former 2x world championship boxer, Jessie Vargas, was interviewed recently and claims to have heard that Mystic Mac was put on his back while training for his upcoming fight with Floyd Mayweather.
"He got knocked out in sparring already," Vargas said of McGregor. "The boxing world is small, it's a small circle. I heard they tried Brandon Rios, but Brandon Rios knocked him out, so they had to push him away."
McGregor is set to face Mayweather on August 26th.