IRON MIKE TYSON SIGNS WITH K1Former Heavyweight boxing champion Iron Mike Tyson has officially signed with the K-1 organization for exclusive management and rights of refusal for Japan.Mike Tyson may still compete in America, but can only fight in Japan in the K-1 organization.No word on when, where or against whom he will first compete.Sources inform Knockouts! that he could compete under boxing rules, kickboxing K1 rules, or even mixed martial arts.