Former IBO welterweight champion Chris van Heerden knows firsthand what it's like to BOX Conor McGregor -- and tells TMZ Sports the guy is gonna get ROCKED by Floyd Mayweather on August 26th at the T-Mobile Arena in Las Vegas.  The 29-year-old professional fighter stepped in the ring with Conor in May 2016 to spar for a few rounds -- and dominated the UFC star. 
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 he is going to kill floyd in there they better have paul bearers ready no where for floyd to run this time
 he is going to kill floyd in there they better have paul bearers ready no where for floyd to run this time
							
						
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