Mac Danzig is an American professional mixed martial arts instructor & practitioner, and is the current lightweight division champion for the King of the Cage.
He is known for having a vegan diet as well as being an animal rights supporter.
en.wikipedia.org/wiki/Mac_Danzig
Here is an interview with him on Peta website:
peta2.com/outthere/o-macdanzig.asp?c=p21803