Jack Sieg
Encyclopedia
Jack Sieg was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 swimmer who developed the Butterfly stroke
Butterfly stroke
The butterfly is a swimming stroke swum on the breast, with both arms moving simultaneously. The butterfly kick was developed separately, and is also known as the "dolphin kick"...

 in 1935. He competed for the University of Iowa
University of Iowa
The University of Iowa is a public state-supported research university located in Iowa City, Iowa, United States. It is the oldest public university in the state. The university is organized into eleven colleges granting undergraduate, graduate, and professional degrees...

 and first used the stroke in a breaststroke leg of a medley relay
Medley relay
Medley relay may refer to:Swimming*Medley swimming, mixed distance relay eventsTrack and field*Distance medley relay*Sprint medley relay*Swedish medley relay...

.
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