I have never looked favorably on "sporting events" which required its participants to look like rabid rapists and bear names like "Pimp Daddy" or "the mutilator" or "Murderin' Mike." etc then proceeds to have the two participants mercilessly beat the living crap out of one another for no reason other than to gain a title.
its a little stupid if you ask me
but then again, so is a job firing someone because of their hobbies outside work.
If he didnt break any laws, whats the big deal?