 He set world records in 1920, 1921, 1923, 1925 and 1926 in the 400 m breaststroke, in 1922 and 1927 in the 200 m breaststroke, in 1924 in the 200 yards breaststroke, and in 1925 in the 100 and 500 m breaststrokes.He also set 15 national records and appeared in 42 international water polo matches.He missed the 1920 and 1924 Olympics because Germany was not allowed to compete there.