Ronald Lee Marchini (aka Ron Marchini) is an American martial artist who is a champion at renbukai. He wrote books on karate and renbukai with Leo Fong, a martial artist known for renbukai and Power training in Kung-Fu and karate. In May 1964, at Takayuki Kubota's All-Stars Tournament in Los Angeles, California, Marchini fought Chuck Norris, who earned his first martial arts tournament championship by defeating Marchini by a half a point.

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