Joel Diaz explains why Juan Manuel Marquez is still such a dangerous fighter at age 40
VISIT http://www.HustleBoss.com FOR MORE EXCLUSIVES HustleBoss.com's Chris Robinson speaks with Indio, Calif.-based trainer Joel Diaz about why Juan Manuel Marquez, who he led Tim Bradley into battle against this past October, is still such a dangerous fighter at age 40. Photo credits: Chris Robinson (http://www.HustleBoss.com) Music credits: $DOLLA DIBIASE ( / dolladibiase )