The TV undercard for the Floyd Mayweather vs Juan Manuel Marquez showdown on September 19 was officially announced today. The lineup includes WBA featherweight champion Chris John (42-0-2, 22 KOs) in a rematch against Rocky Juarez (28-4-1, 20 KOs), former WBO interim lightweight champion Michael Katsidis (25-2, 21 KOs) will try to regain that now vacant title against 2004 Olympian Vicente Escobedo
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