Otto Siffling (3 August 1912 – 20 October 1939) was a German footballer who played as a forward for SV Waldhof Mannheim and the Germany national team. As Germany international, he made 31 appearances scoring 17 goals between 1934 and 1938 and was a participant in the 1934 FIFA World Cup, where he scored a goal. He was part of the Breslau Eleven that beat Denmark 8–0 in Breslau in 1937 and went on to win 10 out 11 games played during that year. He was also part of Germany’s squad at the 1936 Summer Olympics.
Enthusiasm is everything. It must be taut and vibrating like a guitar string.