David_Armbruster_(swim_coach)

Jack Sieg

Jack Sieg

American swimmer (1914–1968)


Jack George Sieg (December 10, 1914 – December 21, 1968) was an American swimmer who used the butterfly stroke in 1935,[1] developed by his coach Dave Armbruster.[2] He competed for the University of Iowa[3] and first used the stroke in a breaststroke leg of a medley relay February 25, 1935.[4]

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