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Paul Malignaggi, a former two-division titlist, will also share his insight on the Showtime PPV<p>As UFC champion Conor McGregor continues to prepare for his Aug. 26 boxing megafight against former pound-for-pound king Floyd Mayweather, he has enlisted the help of a former two-division titleholder to …

Read more at CBS Sports: http://www.cbssports.com/boxing/news/mcgregor-adds-two-time-boxing-champ-as-sparring-partner-for-mayweather-fight/