Toni Valtonen, an
MMA fighter of Finland. A Nazi symbol tattoo has become controversial as the
M1 Company orders Valtonen to remove the tattoo and does not allow him to
fight with the tatoos apparent. Valtonen did not made his official statement but he passed along a statement saying, "I had a crazy and rebellious youth, I made some faults in my past and I am not proud of these marks. I regret that I ever had these tattoos made. Nowadays I am a dedicated family man and professional athlete, and I am not involved in any politics whatsoever." But this statement does not convince the M-1 and HDNet to continue having him represent their companies.
Racism in the more extreme fight sports is a wide spread problem, here are some more:

Niko Puhakka (also from Finland).
http://slackbastard.anarchobase.com/?p=20894 (for mor info on this guy)

Melvin Costa (from the USA, California).
He even has his own Metapedia page.
And here you have an article about racism in the MMA world.
http://www.fightingwords.ca/2010/02/...-stepped-away/