Legendary Trainer Derek Bozy Ennis reacts to Gervonta Davis Brutally Knocking Frank Martin out in the 8th Round, Floyd Mayweather Leaking Sparring between Devin Haney and Gervonta Davis and David Avaneysan stepping in for Cody Crowley to face Jaron Ennis on July 13th. #bozyennis #gervontadavis #jaronennis #devinhaney #boxing #ysmsportsmedia