1920 Olympic Bronze and Silver

At the 1920 Summer Olympics Blitz won a bronze medal in the 100 m backstroke, and a silver medal with the Belgian water polo team, which also included his brother Maurice. He failed to reach the finals of the 100 m and 4 × 200 m freestyle events.^[2]

On 16 September 1921 he set a world record in the 400 m backstroke at 5:59.2, that lasted until 1927, and held the ASA (English) record for the 150 meter backstroke briefly from 1920-21.^[2][3]

1924 Olympic Silver

At the 1924 Summer Olympics, the Blitz brothers were still part of the Belgian water polo squad. The team won another silver medal. Blitz also finished fourth in the 100 m backstroke swimming event. He had little luck at the 1928 Games, as his water polo team finished fifth, and he was eliminated in the heats of his swimming events.

1936 Olympic Bronze

Eight years later, at the 1936 Summer Berlin Games, he won his last Olympic medal, a bronze in water polo. He played all seven matches. Blitz was one of a number of Jewish athletes who won medals at the 1936 Nazi Olympics.^[2][4][5] The Nazi regime had passed the anti-Semitic Nuremberg laws the prior Fall which stripped German Jews of citizenship, opportunities to receive a public education, and access to many professions and public facilities. Jewish businesses had been boycotted and Jews could not serve in the legal profession, the civil service, teach in secondary schools or universities or vote or hold public office.^[6]

Blitz died in 1979. In 1990 he was inducted in the International Swimming Hall of Fame as an Honor Pioneer Swimmer.^[3]