Jaun Diaz and David Diaz will fight for the light wieght belt. Will all four belts be on the line or just one. If all four belts are up for grabs and Juan wins, which other fighter has held all four belts in that wieght class befor,if at all.

no, juan diaz is fighting julio diaz. this will unify the wbo, wba and ibf belts.

david diaz has the wbc belt and i heard was to fight katsidis(?)

obviously katsidis won't be allowed to keep the title unless he changes his name to diaz.