William Rodenbach of the New York West Side Athletic Club won the National AAU at middleweight fives times (1900 to 1904). He also won the National AAU at heavyweight twice (1901 & 1904). In 1904 shortly after winning the AAU titles at middleweight and heavyweight (beating two middleweights & two heavyweights in one evening), he had notable victory vs. Sam Berger who later that year went on to be the first Olympic heavyweight champion. In top condition Rodenbach weighed 158 pounds, he stood 5'9". In his time Rodenbach was considered the best amateur in the United States and in the world by many.
1902 he won the National AAU uncontested.
It has been reported that ligament damage may have forced Rodenbach to retire from boxing in September of 1904.