The truth is, DeLa Hoya has one year to defend his title. He does have the option to fight a non-mandatory, and that would have to be agreed upon by the WBC. The fact that Mayweather is already a WBC Champ in another division would give him more of the BS "Emeritus" status (the automatic #1), so this is how the game is played.

No one has explained how Mayorga got to fight for the title in the first place. Didn't he lose to Trinidad (MWT) before fighting Castillejo (SuWlt)?