WATCH: YouTube star KSI floored by Badou Jack in sparring at Mayweather Gym
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- Category : YouTube
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When U.K.-based YouTube star KSI was in need of boxing expertise and guidance, he turned to two-time world champion Badou Jack "The Ripper," embedding with Team Jack and trainer Floyd Mayweather Sr. for a week-long training regimen at Mayweather Boxing Club in Las Vegas. Jack, who last …