Polo Agassiz played polo for the
Myopia Hunt Club and became "one of the most prominent polo players in the country". His international handicap was ten goals, placing him in the elite group of
ten goal polo champions. He played in many international polo matches, and again in 1905. Agassiz was injured in a match in Newport in the summer of 1906 and underwent surgery in January 1906. He was struck in the mouth by a mallet at a match in Newport on August 30, 1906, breaking three of his front teeth. Agassiz was captain of the Myopia team in 1908. He was a member of the American team that played in the match against the English at Georgian Court in 1910. In 1911, he was on the American team that competed against the English at
Westbury, Long Island. He also played on the American team for the International Polo Cup in 1913. In March 1912, Agassiz became the president of the
Westchester Polo Club, the group responsible for the International Polo Cup. However, in February 1914, he sold his
polo ponies and withdrew from competition to spend more time on business matters. He continued to help prepare the American team for its match with British polo players in the summer of 1914. In 1908, he was a polo pony and stallion judge for the National Horse Show Association's annual event at
Madison Square Garden. In August 1905, he became the secretary and treasurer of the
Calumet and Hecla Consolidated Copper Company, a business managed by his father. He was also a director of the Allouez Mining Company, La Salle Copper Company, and the Osceolo Consolidated Mining Co. He became a director of the American Loan & Trust Company of Boston in January 1907. After his father died in 1910, Agassiz became the vice president of Calumet and Hecla Consolidated Copper Company. Even as his health declined in 1933, he continued to make weekly business trips to New York City and biannual trips to Michigan to oversee
Calumet and Hecla. == Personal life ==