Floyd Mayweather Sr. has replaced Don House as head trainer for WBO super featherweight champion Joan Guzman (27-0, 17 KOs). Mayweather's first assignment will be May 26th as Guzman challenges WBO lightweight champion Michael Katsidis (22-0, 20 KOs) for his 135lb belt. The bout will be the main event and broadcast on HBO.
Joan Guzman Retains Floyd Mayweather, Sr.
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