I honestly and personally don't know of anything like this being required in a professional championship fight.

Has this been done in the history of boxing?To anyone knowledgeable enough, please enlighten me and all other boxing fans coz I'm really on the belief that Mayweather is doing this to avoid Pac.

Mayweather has a history of avoiding big punchers and he might be doing this to avoid being KOed in the biggest fight of his career.