Complex sentence: Campbell won three U.S. national championships and a gold medal at the 1963 Pan American Games judo competition and was the captain of the U.S. judo team in the 1964 Summer Olympics, competing in the open weight class.
Split into simpler sentences: Campbell won three U.S. national championships and a gold medal at the 1963 Pan American Games judo competition. Campbell was the captain of the U.S. judo team in the 1964 Summer Olympics, competing in the open weight class.